php-general Digest 4 Jun 2006 16:16:38 -0000 Issue 4166
php-general Digest 4 Jun 2006 16:16:38 - Issue 4166
Topics (messages 237334 through 237347):
Re: Delete
237334 by: benifactor
237335 by: Rabin Vincent
237337 by: George Babichev
237338 by: Larry Garfield
237339 by: Rabin Vincent
237341 by: tedd
Re: php java intregration
237336 by: Rabin Vincent
How do I make a HTML tree for a set of nodes?
237340 by: Niels
237342 by: tedd
237343 by: Niels
237344 by: tedd
237345 by: Niels
237346 by: Martin Alterisio
237347 by: Mike Bellerby
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--
---BeginMessage---
when you insert each blog into your database, im assuming your not doing
this by hand each and every time, assign each blog an id.
in the place you want to delete the blog entries, list all of the blogs
titles and ids.
and then use mysql(delete);
example:
?
//create a variable for the delete blog entry of you control panel
if ($view == delete_blog) {
//this should be the value of your submit button
if ($deleteBlog) {
//this is the value of the blog entries to delete
if (!$idblog) {
//this is your error message, to be displayed if no blog was
chosen to delete
$de = font face=tahoma color=black size=1You Need To
Choose a post to delete/font;
}
else {
//list the values of the array in which all the blog entries
you would like to delete are
$delBlog = implode(,, $idblog);
//do the actual deletion
mysql_query(delete From blogs where id
IN($delBlog)) or die(mysql_error());
//display the succesfull message if the blog
entries were deleted
echo(font face=tahoma color=black
size=1bcenterblog(s):/b $delBlog bhas/have been
deleted;/b/b/center);
//now we display the blog entries
//plus the sucsessfull message
?
form method=post
?php
$gn = mysql_query(Select * FROM blogs);
while ($d = mysql_fetch_array($gn)) {
?
INPUT TYPE=checkbox NAME=idBlog[] VALUE=? echo($d[id]); ??
echo(font face=tahoma color=black size=1bPost id:/b $d[id]b;/b
bPost Title:/b $d[title]b;/b bPosted by:/b
$d[poster]b;/bbr); ?
?php
}
?
brbrinput type=submit name=deleteNerd value=Delete
class=button
/form
?php
}
}
else {
//display blog entries only
?
form method=post
?php
$gn = mysql_query(Select * FROM blogs);
while ($d = mysql_fetch_array($gn)) {
?
INPUT TYPE=checkbox NAME=idBlog[] VALUE=? echo($d[id]); ??
echo(font face=tahoma color=black size=1bPost id:/b $d[id]b;/b
bPost Title:/b $d[title]b;/b bPosted by:/b
$d[poster]b;/bbr); ?
?php
}
?
brbrinput type=submit name=deleteNerd value=Delete class=button
/form
?php
}
?
this is a very rough example, however you should catch the drift, make your
id an array, implode that array and delete all the array data from the
database.
- Original Message -
From: George Babichev [EMAIL PROTECTED]
To: PHP General list php-general@lists.php.net
Sent: Saturday, June 03, 2006 6:40 PM
Subject: [PHP] Delete
Hello everyone! I wrote a blog application, but now for the admin panel, i
am trying to add a feature to delete blog posts. It would show the title
of
the post next to it, and have a delete link which would delete it. How
would
I do this? I mean if I have multiple blog entry's, how would I delete them
without using php my admin?
---End Message---
---BeginMessage---
On 6/4/06, George Babichev [EMAIL PROTECTED] wrote:
Hello everyone! I wrote a blog application, but now for the admin panel, i
am trying to add a feature to delete blog posts. It would show the title of
the post next to it, and have a delete link which would delete it. How would
I do this? I mean if I have multiple blog entry's, how would I delete them
without using php my admin?
Presumably, you have an id column in your blog posts table
which is the primary key. Then you can just delete posts by
doing something like:
mysql_query('DELETE FROM posts WHERE id = 2312');
Or if you want to delete multiple in one go
mysql_query('DELETE FROM posts WHERE id IN (23,34,12)');
Rabin
---End Message---
---BeginMessage---
Thank you for the help guys, but the I guess I kinda have another question.
So I do assign an id to each blog post, and it is auto_increment, so in my
blog delete page, it would display all the blog title's and a delete button
nex to it. So lets say I click delete on the third entry. How would my
program know to delete THAT entry and not another one?
On 6/3/06, benifactor [EMAIL PROTECTED] wrote:
when you insert each blog into your database, im assuming your not doing
this by hand each and every time,
Re: [PHP] Delete
Make each button a separate form, with the id as a hidden value. Like so:
div
form method='post'
pMy first entry/p
input type='hidden' name='id' value='1' /
input type='submit' value='Delete' /
/form
/div
div
form method='post'
pMy second entry/p
input type='hidden' name='id' value='2' /
input type='submit' value='Delete' /
/form
/div
Obviously you'd want something better formatted, but you get the idea. Then
on the receiving end, you'd simply DELETE FROM entries where id=$id;. That
is, AFTER you process and clean the submitted id value so that it's not an
injection risk. :-)
On Sunday 04 June 2006 00:53, George Babichev wrote:
Thank you for the help guys, but the I guess I kinda have another question.
So I do assign an id to each blog post, and it is auto_increment, so in my
blog delete page, it would display all the blog title's and a delete button
nex to it. So lets say I click delete on the third entry. How would my
program know to delete THAT entry and not another one?
On 6/3/06, benifactor [EMAIL PROTECTED] wrote:
when you insert each blog into your database, im assuming your not doing
this by hand each and every time, assign each blog an id.
in the place you want to delete the blog entries, list all of the blogs
titles and ids.
and then use mysql(delete);
example:
?
//create a variable for the delete blog entry of you control panel
if ($view == delete_blog) {
//this should be the value of your submit button
if ($deleteBlog) {
//this is the value of the blog entries to delete
if (!$idblog) {
//this is your error message, to be displayed if no blog
was
chosen to delete
$de = font face=tahoma color=black size=1You Need To
Choose a post to delete/font;
}
else {
//list the values of the array in which all the blog
entries
you would like to delete are
$delBlog = implode(,, $idblog);
//do the actual deletion
mysql_query(delete From blogs where id
IN($delBlog)) or die(mysql_error());
//display the succesfull message if the blog
entries were deleted
echo(font face=tahoma color=black
size=1bcenterblog(s):/b $delBlog bhas/have been
deleted;/b/b/center);
//now we display the blog entries
//plus the sucsessfull message
?
form method=post
?php
$gn = mysql_query(Select * FROM blogs);
while ($d = mysql_fetch_array($gn)) {
?
INPUT TYPE=checkbox NAME=idBlog[] VALUE=? echo($d[id]); ??
echo(font face=tahoma color=black size=1bPost id:/b $d[id]b;/b
bPost Title:/b $d[title]b;/b bPosted by:/b
$d[poster]b;/bbr); ?
?php
}
?
brbrinput type=submit name=deleteNerd value=Delete
class=button
/form
?php
}
}
else {
//display blog entries only
?
form method=post
?php
$gn = mysql_query(Select * FROM blogs);
while ($d = mysql_fetch_array($gn)) {
?
INPUT TYPE=checkbox NAME=idBlog[] VALUE=? echo($d[id]); ??
echo(font face=tahoma color=black size=1bPost id:/b $d[id]b;/b
bPost Title:/b $d[title]b;/b bPosted by:/b
$d[poster]b;/bbr); ?
?php
}
?
brbrinput type=submit name=deleteNerd value=Delete
class=button
/form
?php
}
?
this is a very rough example, however you should catch the drift, make
your
id an array, implode that array and delete all the array data from the
database.
- Original Message -
From: George Babichev [EMAIL PROTECTED]
To: PHP General list php-general@lists.php.net
Sent: Saturday, June 03, 2006 6:40 PM
Subject: [PHP] Delete
Hello everyone! I wrote a blog application, but now for the admin
panel,
i
am trying to add a feature to delete blog posts. It would show the
title
of
the post next to it, and have a delete link which would delete it. How
would
I do this? I mean if I have multiple blog entry's, how would I delete
them
without using php my admin?
--
Larry Garfield AIM: LOLG42
[EMAIL PROTECTED] ICQ: 6817012
If nature has made any one thing less susceptible than all others of
exclusive property, it is the action of the thinking power called an idea,
which an individual may exclusively possess as long as he keeps it to
himself; but the moment it is divulged, it forces itself into the possession
of every one, and the receiver cannot dispossess himself of it. -- Thomas
Jefferson
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Delete
On 6/4/06, Larry Garfield [EMAIL PROTECTED] wrote: Make each button a separate form, with the id as a hidden value. Like so: div form method='post' pMy first entry/p input type='hidden' name='id' value='1' / input type='submit' value='Delete' / /form /div [snip] You may find it easier to generate links of the form delete.php?id=1, etc. Then you won't have to use a seperate form for each link. The id will be available in delete.php in $_GET. The same sanity checking applies in this case too. Rabin -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] How do I make a HTML tree for a set of nodes?
Hi, I have a set of nodes. Each node has a parent and so the set can be thought of as a tree. I want to show that tree somehow on a webpage, served by PHP. I cannot use Dot/Graphwiz for various reasons. What I'm looking for is an output of DIVs or tablecells, showing the nodes and their connections. It's not a trivial task, IMO, but doable. Possibly somebody has already made something similiar, but I can't find anything on Google. Can anybody point me to helpful information? Thanks, Niels -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Delete
At 10:53 PM -0700 6/3/06, George Babichev wrote: Thank you for the help guys, but the I guess I kinda have another question. So I do assign an id to each blog post, and it is auto_increment, so in my blog delete page, it would display all the blog title's and a delete button nex to it. So lets say I click delete on the third entry. How would my program know to delete THAT entry and not another one? Your specific question of how to delete I am sure other will provide, but consider this idea. If you have a page that shows blog entries, then why not have an admin page that shows exactly the same thing except if has check-boxes next to the posts? And, if you check any of those and click Submit, then those entries will be deleted from the database -- simple, plus you already have most of the code. :-) I had a similar problem and was designing an admin page that would do the things I wanted (add/delete/alter items) when it dawned on me that all I needed was a check-box and a submit button added to my main display page. As to how to delete and such, you may find this useful: http://www.weberdev.com/get_example-384.html hth's tedd -- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How do I make a HTML tree for a set of nodes?
At 2:07 PM +0200 6/4/06, Niels wrote: Hi, I have a set of nodes. Each node has a parent and so the set can be thought of as a tree. I want to show that tree somehow on a webpage, served by PHP. I cannot use Dot/Graphwiz for various reasons. What I'm looking for is an output of DIVs or tablecells, showing the nodes and their connections. It's not a trivial task, IMO, but doable. Possibly somebody has already made something similiar, but I can't find anything on Google. Can anybody point me to helpful information? Thanks, Niels What, a binary-tree or linked-list sort of thing? tedd -- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How do I make a HTML tree for a set of nodes?
On Sunday 04 June 2006 14:58, tedd wrote: At 2:07 PM +0200 6/4/06, Niels wrote: Hi, I have a set of nodes. Each node has a parent and so the set can be thought of as a tree. I want to show that tree somehow on a webpage, served by PHP. I cannot use Dot/Graphwiz for various reasons. What I'm looking for is an output of DIVs or tablecells, showing the nodes and their connections. It's not a trivial task, IMO, but doable. Possibly somebody has already made something similiar, but I can't find anything on Google. Can anybody point me to helpful information? Thanks, Niels What, a binary-tree or linked-list sort of thing? tedd Not binary -- a node can have several children. Each node has an id and a parentId. The actual structure isn't important and can easily be objects, arrays-of-arrays or whatever is handy. //Niels -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How do I make a HTML tree for a set of nodes?
At 3:03 PM +0200 6/4/06, Niels wrote: On Sunday 04 June 2006 14:58, tedd wrote: At 2:07 PM +0200 6/4/06, Niels wrote: Hi, I have a set of nodes. Each node has a parent and so the set can be thought of as a tree. I want to show that tree somehow on a webpage, served by PHP. I cannot use Dot/Graphwiz for various reasons. What I'm looking for is an output of DIVs or tablecells, showing the nodes and their connections. It's not a trivial task, IMO, but doable. Possibly somebody has already made something similiar, but I can't find anything on Google. Can anybody point me to helpful information? Thanks, Niels What, a binary-tree or linked-list sort of thing? tedd Not binary -- a node can have several children. Each node has an id and a parentId. The actual structure isn't important and can easily be objects, arrays-of-arrays or whatever is handy. //Niels You can dynamically generate a table and place text (and/or color) the cells that are nodes -- that would be my approach. You would need to know the width and depth of the tree and then just fill in the cells that are nodes. hth's tedd -- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How do I make a HTML tree for a set of nodes?
On Sunday 04 June 2006 15:30, tedd wrote: [snip] You can dynamically generate a table and place text (and/or color) the cells that are nodes -- that would be my approach. You would need to know the width and depth of the tree and then just fill in the cells that are nodes. hth's tedd Yes, well... It's a tad more complicated I think. Yes, I can make a table, finding the dimensions shouldn't be a big problem. Placing the nodes in the right cells isn't as easy, and making the connections is downright difficult. A problem with using a table is that cells can't be individually sized. However DIVs or TDs is a minor problem. The major problem is to walk through the tree properly (recursively probably), and remember the connections. And then rendering them... Thank you for your answer, Niels -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How do I make a HTML tree for a set of nodes?
2006/6/4, Niels [EMAIL PROTECTED]: Hi, I have a set of nodes. Each node has a parent and so the set can be thought of as a tree. I want to show that tree somehow on a webpage, served by PHP. I cannot use Dot/Graphwiz for various reasons. What I'm looking for is an output of DIVs or tablecells, showing the nodes and their connections. It's not a trivial task, IMO, but doable. Possibly somebody has already made something similiar, but I can't find anything on Google. Can anybody point me to helpful information? Thanks, Niels -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php I had a similar problem that, although it was with a binary tree, it can be used with your tree. PHP doesn't like too much the use of recursion, but this time recursion is the way to go (if you want to keep the code maintainable). Hopefully the tree will not span deep enough to cause any problems... (hopefully). The function will receive a node and return a table representation of the branch started by this tree, if you point this function to the root node you'll have your table. In each cell it will have to indicate whether it is empty, it has a node or a line connecting neighbor cells. One important thing to define here is the way the function will organize the nodes in the table, in my function the root node was at the top in the center. First, the trivial case: if the node doesn't have children return a table with one cell, the node itself. Then, the recursive case: if the node have children, call the function with those nodes and store the tables returned. According to the representation I used, it calculated the combined width of those tables, created a new table where the first row contained the parent node centered, the second line an horizontal line from the column where the first children would be to the column where the last children would be. Then it build the rest of the table pasting together, horizontally, the tables of the children. Voila! a nice table representation of the tree.
Re: [PHP] How do I make a HTML tree for a set of nodes?
You could do it by dynamically generating an image. Mike Niels wrote: On Sunday 04 June 2006 15:30, tedd wrote: [snip] You can dynamically generate a table and place text (and/or color) the cells that are nodes -- that would be my approach. You would need to know the width and depth of the tree and then just fill in the cells that are nodes. hth's tedd Yes, well... It's a tad more complicated I think. Yes, I can make a table, finding the dimensions shouldn't be a big problem. Placing the nodes in the right cells isn't as easy, and making the connections is downright difficult. A problem with using a table is that cells can't be individually sized. However DIVs or TDs is a minor problem. The major problem is to walk through the tree properly (recursively probably), and remember the connections. And then rendering them... Thank you for your answer, Niels
Re: [PHP] How do I make a HTML tree for a set of nodes?
On Sunday 04 June 2006 18:37, Mike Bellerby wrote: You could do it by dynamically generating an image. Mike [snip] Yes. But how? I've settled for a simpler solution -- see my answer to Martin Alterisio. Thanks, Niels -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How do I make a HTML tree for a set of nodes?
Hi!
On Sunday 04 June 2006 18:13, Martin Alterisio wrote:
[snip]
I had a similar problem that, although it was with a binary tree, it can
be used with your tree. PHP doesn't like too much the use of recursion,
but this time recursion is the way to go (if you want to keep the code
maintainable). Hopefully the tree will not span deep enough to cause any
problems... (hopefully).
The function will receive a node and return a table representation of the
branch started by this tree, if you point this function to the root node
you'll have your table. In each cell it will have to indicate whether it
is empty, it has a node or a line connecting neighbor cells. One important
thing to define here is the way the function will organize the nodes in
the table, in my function the root node was at the top in the center.
First, the trivial case: if the node doesn't have children return a table
with one cell, the node itself.
Then, the recursive case: if the node have children, call the function
with those nodes and store the tables returned. According to the
representation I used, it calculated the combined width of those tables,
created a new table where the first row contained the parent node
centered, the second line an horizontal line from the column where the
first children would be to the column where the last children would be.
Then it build the rest of the table pasting together, horizontally, the
tables of the children. Voila! a nice table representation of the tree.
This sounds fine -- recursion is obviously the way to go. Where can I see
your function?
I tried several different solutions over the last couple of hours, and I've
settled on only using indentation (like a nested ul/ul list), not a
fancy graph with antialised branches. It's the simplest possible recursion
but I like the results, even if it's a bit harder to grasp without
connections clearly marked.
function tree($nodes, $start, $indent=-30) {
$indent+=30;
global $tree;
foreach ($nodes as $nodeID = $node) {
if ($node['parent']!=$start) {continue;}
$tree.=div
style='margin-left:{$indent}px'{$node['name']}/div;
tree($nodes, $nodeID, $indent);
}
return $tree;
}
Thanks!
//Niels
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[PHP] Re: How do I make a HTML tree for a set of nodes?
Well, if you're asking for some recommendation on how to show it, I would suggest to use lists (either ordered -OL- or unordered -UL- depends on you), or maybe even data-lists (DL), so you would get +- parent 1 | +- child 1 | \- child 2 +- parent 2 \- sub-parent1 +- sub-child 1 \- sub-child 2 into something like ul li parent 1 ul lichild 1/li lichild 2/li /ul /li li parent 2 ul li sub-parent 1 ul lisub-child 1/li lisub-child 2/li /ul /li /ul /li /ul Now, if you're asking for code, send what you've tried so far, and maybe someone will be able to help you (either correcting your code, or sending another way to do it) Niels wrote: I have a set of nodes. Each node has a parent and so the set can be thought of as a tree. I want to show that tree somehow on a webpage, served by PHP. I cannot use Dot/Graphwiz for various reasons. What I'm looking for is an output of DIVs or tablecells, showing the nodes and their connections. It's not a trivial task, IMO, but doable. Possibly somebody has already made something similiar, but I can't find anything on Google. Can anybody point me to helpful information? -- Atentamente / Sincerely, J. Rafael Salazar Magaña -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How do I make a HTML tree for a set of nodes?
2006/6/4, Niels [EMAIL PROTECTED]:
Hi!
On Sunday 04 June 2006 18:13, Martin Alterisio wrote:
[snip]
I had a similar problem that, although it was with a binary tree, it can
be used with your tree. PHP doesn't like too much the use of recursion,
but this time recursion is the way to go (if you want to keep the code
maintainable). Hopefully the tree will not span deep enough to cause any
problems... (hopefully).
The function will receive a node and return a table representation of
the
branch started by this tree, if you point this function to the root node
you'll have your table. In each cell it will have to indicate whether it
is empty, it has a node or a line connecting neighbor cells. One
important
thing to define here is the way the function will organize the nodes in
the table, in my function the root node was at the top in the center.
First, the trivial case: if the node doesn't have children return a
table
with one cell, the node itself.
Then, the recursive case: if the node have children, call the function
with those nodes and store the tables returned. According to the
representation I used, it calculated the combined width of those tables,
created a new table where the first row contained the parent node
centered, the second line an horizontal line from the column where the
first children would be to the column where the last children would be.
Then it build the rest of the table pasting together, horizontally, the
tables of the children. Voila! a nice table representation of the tree.
This sounds fine -- recursion is obviously the way to go. Where can I see
your function?
I tried several different solutions over the last couple of hours, and
I've
settled on only using indentation (like a nested ul/ul list), not a
fancy graph with antialised branches. It's the simplest possible recursion
but I like the results, even if it's a bit harder to grasp without
connections clearly marked.
function tree($nodes, $start, $indent=-30) {
$indent+=30;
global $tree;
foreach ($nodes as $nodeID = $node) {
if ($node['parent']!=$start) {continue;}
$tree.=div
style='margin-left:{$indent}px'{$node['name']}/div;
tree($nodes, $nodeID, $indent);
}
return $tree;
}
Thanks!
//Niels
--
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To unsubscribe, visit: http://www.php.net/unsub.php
Sorry, I can't show you the code. Anyway you don't seem to need it. One
recommendation, don't rely on global vars, look at this:
function tree($nodes, $start, $indent=-30) {
$indent+=30;
$tree = ;
foreach ($nodes as $nodeID = $node) {
if ($node['parent']!=$start) {continue;}
$tree .= div
style='margin-left:{$indent}px'{$node['name']}/div;
$tree .= tree($nodes, $nodeID, $indent);
}
return $tree;
}
Re: [PHP] How do I make a HTML tree for a set of nodes?
At 3:38 PM +0200 6/4/06, Niels wrote: On Sunday 04 June 2006 15:30, tedd wrote: [snip] You can dynamically generate a table and place text (and/or color) the cells that are nodes -- that would be my approach. You would need to know the width and depth of the tree and then just fill in the cells that are nodes. hth's tedd Yes, well... It's a tad more complicated I think. Yes, I can make a table, finding the dimensions shouldn't be a big problem. Placing the nodes in the right cells isn't as easy, and making the connections is downright difficult. A problem with using a table is that cells can't be individually sized. However DIVs or TDs is a minor problem. The major problem is to walk through the tree properly (recursively probably), and remember the connections. And then rendering them... I've done this before, but not with html. My demo is at: http://www.sperling.com/freeware.php So, I have an idea of what's involved. If this just for display, then it shouldn't be too difficult to display the end results in a table -- provided, you know in advance the largest any row will be. It will be a simple grid, unless you want to play with column spacing, which will be very difficult indeed to manage. As for cells not being individually sized, you're right they can't be sized, but they do automatically size to their contents and that can be varied as well shown with different background colors. Are you going to use this for something other than display, is it functional in some way? Because if you're going to add functionality, such as editing, deleting, sorting, then you have a big chore in front of you. As for using recursive functions, absolutely -- they make the process (and code) much less. However, you need to wrap your mind around things spinning around to their conclusion, which is sometimes difficult to imagine. Good luck. tedd -- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How do I make a HTML tree for a set of nodes?
Hi, On Sunday 04 June 2006 19:02, Martin Alterisio wrote: [snip] Sorry, I can't show you the code. Anyway you don't seem to need it. One recommendation, don't rely on global vars, look at this: Quite right, I'd have gotten around to fixing that later. Thank you for your answer, I appreciate it! Niels -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Delete
On Sunday 04 June 2006 03:11, Rabin Vincent wrote: On 6/4/06, Larry Garfield [EMAIL PROTECTED] wrote: Make each button a separate form, with the id as a hidden value. Like so: div form method='post' pMy first entry/p input type='hidden' name='id' value='1' / input type='submit' value='Delete' / /form /div [snip] You may find it easier to generate links of the form delete.php?id=1, etc. Then you won't have to use a seperate form for each link. The id will be available in delete.php in $_GET. The same sanity checking applies in this case too. Rabin Only if delete.php is a confirmation page. Never ever ever have a delete function that operates solely by GET. Here's why: http://thedailywtf.com/forums/thread/66166.aspx :-) -- Larry Garfield AIM: LOLG42 [EMAIL PROTECTED] ICQ: 6817012 If nature has made any one thing less susceptible than all others of exclusive property, it is the action of the thinking power called an idea, which an individual may exclusively possess as long as he keeps it to himself; but the moment it is divulged, it forces itself into the possession of every one, and the receiver cannot dispossess himself of it. -- Thomas Jefferson -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How do I make a HTML tree for a set of nodes?
Hi, On Sunday 04 June 2006 19:08, tedd wrote: At 3:38 PM +0200 6/4/06, Niels wrote: On Sunday 04 June 2006 15:30, tedd wrote: [snip] You can dynamically generate a table and place text (and/or color) the cells that are nodes -- that would be my approach. You would need to know the width and depth of the tree and then just fill in the cells that are nodes. hth's tedd Yes, well... It's a tad more complicated I think. Yes, I can make a table, finding the dimensions shouldn't be a big problem. Placing the nodes in the right cells isn't as easy, and making the connections is downright difficult. A problem with using a table is that cells can't be individually sized. However DIVs or TDs is a minor problem. The major problem is to walk through the tree properly (recursively probably), and remember the connections. And then rendering them... I've done this before, but not with html. My demo is at: http://www.sperling.com/freeware.php So, I have an idea of what's involved. If this just for display, then it shouldn't be too difficult to display the end results in a table -- provided, you know in advance the largest any row will be. It will be a simple grid, unless you want to play with column spacing, which will be very difficult indeed to manage. As for cells not being individually sized, you're right they can't be sized, but they do automatically size to their contents and that can be varied as well shown with different background colors. Are you going to use this for something other than display, is it functional in some way? Because if you're going to add functionality, such as editing, deleting, sorting, then you have a big chore in front of you. As for using recursive functions, absolutely -- they make the process (and code) much less. However, you need to wrap your mind around things spinning around to their conclusion, which is sometimes difficult to imagine. Good luck. tedd Thank you for your answer, I appreciate it! Years ago I made Javascript navigation tree -- like a file browser, with expandable branches and so on. It was a big problem to parse all the relationships to img tags and links. I just had a looks at that code -- 10 years old, and it works! I couldn't change it to my current needs though. As I said elsewhere on this thread, I've settled for a simple, indented tree-view. Each node is a link and some text, and it's all reasonably easy to understand. And it's a small function -- I know about the dangers of recursion. Choosing this simple layout will also make it easier to render the output to PDF at a later stage. If I were to make a real tree, I wouldn't use a table. It's too difficult to manage IMO. I'd probably look for a generic graph algorithm somewhere, and try some dhtml voodoo with flying DIVs. Thanks again, Niels -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Delete
Yes, that checkbox idea is exactly what I was thinking about. Exept I have no idea how my program would tell one checkbox from the other, and delete the wrong thing... On 6/4/06, tedd [EMAIL PROTECTED] wrote: At 10:53 PM -0700 6/3/06, George Babichev wrote: Thank you for the help guys, but the I guess I kinda have another question. So I do assign an id to each blog post, and it is auto_increment, so in my blog delete page, it would display all the blog title's and a delete button nex to it. So lets say I click delete on the third entry. How would my program know to delete THAT entry and not another one? Your specific question of how to delete I am sure other will provide, but consider this idea. If you have a page that shows blog entries, then why not have an admin page that shows exactly the same thing except if has check-boxes next to the posts? And, if you check any of those and click Submit, then those entries will be deleted from the database -- simple, plus you already have most of the code. :-) I had a similar problem and was designing an admin page that would do the things I wanted (add/delete/alter items) when it dawned on me that all I needed was a check-box and a submit button added to my main display page. As to how to delete and such, you may find this useful: http://www.weberdev.com/get_example-384.html hth's tedd -- http://sperling.com http://ancientstones.com http://earthstones.com
[PHP] When is z != z ?
Hi gang:
Here's your opportunity to pound me again for not knowing the basics of php.
I vaguely remember something like this being discussed a while back, but can't
find the reference.
In any event, if one uses --
for ($i=a; $iz; $i++)
{
echo($i);
}
-- it stops at y
But, if you use --
for ($i=a; $i=z; $i++)
{
echo($i);
}
-- it prints considerably more characters after z than what one would
normally expect -- why is that?
Just stopping at z would seem to make more sense, wouldn't it? After all,
when $i = z in the first expression, then wouldn't $i be equal to z in the
second expression and thus halt the operation?
What am I missing here?
Thanks.
tedd
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Re: [PHP] Delete
At 10:30 AM -0700 6/4/06, George Babichev wrote: Yes, that checkbox idea is exactly what I was thinking about. Exept I have no idea how my program would tell one checkbox from the other, and delete the wrong thing... George: You're going to have to play around with forms and find out how check-boxes work. One you can figure out how to pass a confirm/not-confirm via a list of check-boxes, then we can proceed to the next step. tedd -- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How do I make a HTML tree for a set of nodes?
At 7:26 PM +0200 6/4/06, Niels wrote: If I were to make a real tree, I wouldn't use a table. It's too difficult to manage IMO. I'd probably look for a generic graph algorithm somewhere, and try some dhtml voodoo with flying DIVs. Thanks again, Niels Niels: The below link may not at first look like what you're after, but belive me, you'll find stuff that will make you think how you can use it to do what you want. http://www.cssplay.co.uk/index.html Happy exploring. Using a combination of css and php will do what you want, I'm sure of it. tedd -- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] How do I make a HTML tree for a set of nodes?
On Sunday 04 June 2006 19:49, tedd wrote: At 7:26 PM +0200 6/4/06, Niels wrote: If I were to make a real tree, I wouldn't use a table. It's too difficult to manage IMO. I'd probably look for a generic graph algorithm somewhere, and try some dhtml voodoo with flying DIVs. Thanks again, Niels Niels: The below link may not at first look like what you're after, but belive me, you'll find stuff that will make you think how you can use it to do what you want. http://www.cssplay.co.uk/index.html Happy exploring. Very cool!!! I've also started using the Javascript library from http://script.aculo.us/ -- that certainly saves me a lot of headaches. Using a combination of css and php will do what you want, I'm sure of it. I want world peace... Thanks again, Niels -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
tedd wrote:
Hi gang:
Here's your opportunity to pound me again for not knowing the basics of php.
I vaguely remember something like this being discussed a while back, but can't
find the reference.
In any event, if one uses --
for ($i=a; $iz; $i++)
{
echo($i);
}
-- it stops at y
But, if you use --
for ($i=a; $i=z; $i++)
{
echo($i);
}
-- it prints considerably more characters after z than what one would
normally expect -- why is that?
Just stopping at z would seem to make more sense, wouldn't it? After all, when $i = z
in the first expression, then wouldn't $i be equal to z in the second expression and thus halt
the operation?
What am I missing here?
It's a bit of a quirk. z++ is aa and aa z. I would guess
this would loop until until just before za which would be yz.
It's a bit like looping through the hexadecimal characters. You would
have the same effect. However instead of being base-16 with 0-9-a-f you
have base-26 using a-z.
-Rasmus
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Re: [PHP] When is z != z ?
2006/6/4, Rasmus Lerdorf [EMAIL PROTECTED]:
tedd wrote:
Hi gang:
Here's your opportunity to pound me again for not knowing the basics of
php.
I vaguely remember something like this being discussed a while back, but
can't find the reference.
In any event, if one uses --
for ($i=a; $iz; $i++)
{
echo($i);
}
-- it stops at y
But, if you use --
for ($i=a; $i=z; $i++)
{
echo($i);
}
-- it prints considerably more characters after z than what one would
normally expect -- why is that?
Just stopping at z would seem to make more sense, wouldn't it? After
all, when $i = z in the first expression, then wouldn't $i be equal to z
in the second expression and thus halt the operation?
What am I missing here?
It's a bit of a quirk. z++ is aa and aa z. I would guess
this would loop until until just before za which would be yz.
What?
z++ z returns true? =S
Is there a reason for this? Why aren't they handled like C chars?
It's a bit like looping through the hexadecimal characters. You would
have the same effect. However instead of being base-16 with 0-9-a-f you
have base-26 using a-z.
0xF++ would be 0x10 which is greater than 0xF (0xF 0x10). It's not the
same.
-Rasmus
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Re: [PHP] How do I make a HTML tree for a set of nodes?
At 8:00 PM +0200 6/4/06, Niels wrote: Using a combination of css and php will do what you want, I'm sure of it. I want world peace... Well, if we were all programming php, we wouldn't have any war, but we wouldn't have any peace either. :-) tedd -- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
Martin Alterisio wrote:
2006/6/4, Rasmus Lerdorf [EMAIL PROTECTED]:
tedd wrote:
Hi gang:
Here's your opportunity to pound me again for not knowing the basics of
php.
I vaguely remember something like this being discussed a while back,
but
can't find the reference.
In any event, if one uses --
for ($i=a; $iz; $i++)
{
echo($i);
}
-- it stops at y
But, if you use --
for ($i=a; $i=z; $i++)
{
echo($i);
}
-- it prints considerably more characters after z than what one would
normally expect -- why is that?
Just stopping at z would seem to make more sense, wouldn't it? After
all, when $i = z in the first expression, then wouldn't $i be equal
to z
in the second expression and thus halt the operation?
What am I missing here?
It's a bit of a quirk. z++ is aa and aa z. I would guess
this would loop until until just before za which would be yz.
What?
z++ z returns true? =S
Is there a reason for this? Why aren't they handled like C chars?
Because PHP is not C. If you want them handled by their char codes,
then do so with chr() calls.
It's a bit like looping through the hexadecimal characters. You would
have the same effect. However instead of being base-16 with 0-9-a-f you
have base-26 using a-z.
0xF++ would be 0x10 which is greater than 0xF (0xF 0x10). It's not the
same.
Sure it is. If you treat 0x10 as a string the same way he is treating
these as strings, then 0x10 is going to be smaller than 0xF.
The fact is that there is just no right answer for what z++ should do.
-Rasmus
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Re: [PHP] How do I make a HTML tree for a set of nodes?
On Sunday 04 June 2006 20:39, tedd wrote: At 8:00 PM +0200 6/4/06, Niels wrote: Using a combination of css and php will do what you want, I'm sure of it. I want world peace... Well, if we were all programming php, we wouldn't have any war, but we wouldn't have any peace either. :-) tedd There's always the good old Vi / Emacs war, if we get bored... //Niels -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
2006/6/4, Rasmus Lerdorf [EMAIL PROTECTED]:
Martin Alterisio wrote:
2006/6/4, Rasmus Lerdorf [EMAIL PROTECTED]:
tedd wrote:
Hi gang:
Here's your opportunity to pound me again for not knowing the basics
of
php.
I vaguely remember something like this being discussed a while back,
but
can't find the reference.
In any event, if one uses --
for ($i=a; $iz; $i++)
{
echo($i);
}
-- it stops at y
But, if you use --
for ($i=a; $i=z; $i++)
{
echo($i);
}
-- it prints considerably more characters after z than what one
would
normally expect -- why is that?
Just stopping at z would seem to make more sense, wouldn't it?
After
all, when $i = z in the first expression, then wouldn't $i be equal
to z
in the second expression and thus halt the operation?
What am I missing here?
It's a bit of a quirk. z++ is aa and aa z. I would guess
this would loop until until just before za which would be yz.
What?
z++ z returns true? =S
Is there a reason for this? Why aren't they handled like C chars?
Because PHP is not C. If you want them handled by their char codes,
then do so with chr() calls.
That's cool, but you missed my point, I was just wondering why the ++
operator for string was handled that way. I used the C comparison becuase
it's more usual for coders to think as chars in terms of their position in
the ASCII table, allowing loops such as the mentioned above. I'm not trying
to start another witch hunt, there are enough rantings around for that
purpose.
It's a bit like looping through the hexadecimal characters. You would
have the same effect. However instead of being base-16 with 0-9-a-f
you
have base-26 using a-z.
0xF++ would be 0x10 which is greater than 0xF (0xF 0x10). It's not
the
same.
Sure it is. If you treat 0x10 as a string the same way he is treating
these as strings, then 0x10 is going to be smaller than 0xF.
The fact is that there is just no right answer for what z++ should do.
-Rasmus
Still:
anything ++anything
should be true, or at least that's what they taught me on abstract data
types design, and I think they're right (at least this time)
Re: [PHP] When is z != z ?
At 11:08 AM -0700 6/4/06, Rasmus Lerdorf wrote:
tedd wrote:
But, if you use --
for ($i=a; $i=z; $i++)
{
echo($i);
}
-- it prints considerably more characters after z than what one would
normally expect -- why is that?
Just stopping at z would seem to make more sense, wouldn't it? After all,
when $i = z in the first expression, then wouldn't $i be equal to z in
the second expression and thus halt the operation?
What am I missing here?
It's a bit of a quirk. z++ is aa and aa z. I would guess this
would loop until until just before za which would be yz.
It's a bit like looping through the hexadecimal characters. You would have
the same effect. However instead of being base-16 with 0-9-a-f you have
base-26 using a-z.
-Rasmus
-Rasmus:
Ahhh -- I see -- sort of.
However, if it has to be a base then it's more like base-676, going from a to
yz. Like DEC has 10 elements and HEX has 16 elements, this has 676 elements.
But, what brothers me about the routine, is that is DOES print z where it is
supposed to. In other words, the characters a-z are output before continuing
with aa and so on. The operation doesn't end with z.
Shouldn't the expression $i =z be true when $i=z and if $i is greater, then
be false?
For example, please review:
http://xn--ovg.com/a1.php
You can here that when $i = z, then the condition is true and it prints
Look. One would think that anything greater than that point would be false
and thus end the loop. But here we have an example of how we can have something
equal to something and then by adding 1 to it, it becomes smaller. That's not
logical.
Furthermore, if it was to work like a base, then I would expect z to the the
last character, not the 26th.
Here's another way to look at it. All characters before z are less than z
-- correct? So, what value are all characters after z (i.e., aa-yz)? They
cannot be greater than, nor can they be less than. So, what are they?
tedd
PS: It was just a day, or so ago, that I said I didn't want disagree with you
and now what have you got me into? running for cover looking for rock to
program with
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Re: [PHP] How do I make a HTML tree for a set of nodes?
At 8:59 PM +0200 6/4/06, Niels wrote: On Sunday 04 June 2006 20:39, tedd wrote: At 8:00 PM +0200 6/4/06, Niels wrote: Using a combination of css and php will do what you want, I'm sure of it. I want world peace... Well, if we were all programming php, we wouldn't have any war, but we wouldn't have any peace either. :-) tedd There's always the good old Vi / Emacs war, if we get bored... Out of the xml camp, I liked this expression. /world tedd -- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
tedd wrote: But, what brothers me about the routine, is that is DOES print z where it is supposed to. In other words, the characters a-z are output before continuing with aa and so on. The operation doesn't end with z. Your condition for the loop to continue is $i=z. When $i = y it will obviously continue because y z When $i = z it will obviously continue because z = z When $i = aa it will obviously continue because aa z It doesn't stop until you get to z+something. As in za because at that point za z so the last thing you see is the one before za which would be yz. Here's another way to look at it. All characters before z are less than z -- correct? So, what value are all characters after z (i.e., aa-yz)? They cannot be greater than, nor can they be less than. So, what are they? But you are not comparing things in the same context here. Strings are naturally compared alphabetically while you are thinking they are compared numerically somehow. Think of sorting a set of words. Would you expect aa to sort before or after z ? So yes, like I said, it is a bit of a quirk, but there is no good answer to what z++ should be and we certainly don't want to change the default comparison mechanism to not compare strings alphabetically because that would screw up all sorts of stuff including usorts and peoples' expectations. It's just in this case where you have gotten it into your head that incrementing strings is a good thing to do. You'd be much better off with a range call to quickly generate a range of characters. You could then loop through that character by character. Or use the chr() function to work with character codes instead. -Rasmus -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
Martin Alterisio wrote: Still: anything ++anything should be true, or at least that's what they taught me on abstract data types design, and I think they're right (at least this time) In loosely typed languages that is not always true. Operators have to guess at the type and try to do what the user expects. There will always be edge cases. Being able to increment strings is pretty handy when you need to create sequences for unique file and directory names. For example, this also works: $filename = file1; $filename++; echo $filename; You would get file2 from this. Think about the amount of code you would need to write in C to make that work? Then change $filename to fileA and increment it. And you get fileB. When we get to fileZ we don't want to go off into unprintable character land, we want to try to stick with the pattern. -Rasmus -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
2006/6/4, Rasmus Lerdorf [EMAIL PROTECTED]: Martin Alterisio wrote: Still: anything ++anything should be true, or at least that's what they taught me on abstract data types design, and I think they're right (at least this time) In loosely typed languages that is not always true. Operators have to guess at the type and try to do what the user expects. There will always be edge cases. Being able to increment strings is pretty handy when you need to create sequences for unique file and directory names. For example, this also works: $filename = file1; $filename++; echo $filename; You would get file2 from this. Think about the amount of code you would need to write in C to make that work? Then change $filename to fileA and increment it. And you get fileB. When we get to fileZ we don't want to go off into unprintable character land, we want to try to stick with the pattern. -Rasmus I still don't see why this functionality should be a native operator of the language. It doesn't seem natural that ++ operator understands that the string could be an enumeration of some kind. I believe that such things should be left to the coder who knows what the string is really representing, not to the language.
Re: [PHP] When is z != z ?
Martin Alterisio wrote: I still don't see why this functionality should be a native operator of the language. It doesn't seem natural that ++ operator understands that the string could be an enumeration of some kind. I believe that such things should be left to the coder who knows what the string is really representing, not to the language. That's the strictly typed argument. If you always force people to declare their types and you never automatically convert them, then you have a strictly typed language. You have the same thing happening for something like: echo 2+3; In a strictly typed language that would spew an error. In a loosely typed language like PHP you get 5 And yes, I agree that ++ on strings is getting near the edge of that, but there has to be an edge somewhere and not everyone is going to agree on exactly where to draw the line. -Rasmus -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
At 12:27 PM -0700 6/4/06, Rasmus Lerdorf wrote: tedd wrote: But, what brothers me about the routine, is that is DOES print z where it is supposed to. In other words, the characters a-z are output before continuing with aa and so on. The operation doesn't end with z. Your condition for the loop to continue is $i=z. [1] When $i = y it will obviously continue because y z [2] When $i = z it will obviously continue because z = z [3] When $i = aa it will obviously continue because aa z I agree with [1] and [2], but [3] is where we part company. You see, if you are right, then aaa would also be less than z, but that doesn't appear so. It doesn't stop until you get to z+something. As in za because at that point za z so the last thing you see is the one before za which would be yz. See above -- plus, I would expect that in evaluating a character, that character(s) would not enter the mix. If I was to evaluate a single digit, it would seem odd if double digits were allowed in that evaluation. Here's another way to look at it. All characters before z are less than z -- correct? So, what value are all characters after z (i.e., aa-yz)? They cannot be greater than, nor can they be less than. So, what are they? But you are not comparing things in the same context here. Strings are naturally compared alphabetically while you are thinking they are compared numerically somehow. Think of sorting a set of words. Would you expect aa to sort before or after z ? Not meaning to infer that you don't know this, because I know you do -- so I must be confused. Yes, it is my contention that strings are numerical -- you don't store A in memory, you store 0100 001, or ASCII DEC 65. Likewise a is DEC 97 (0110 0001) and z is DEC 122 (0111 1010) and if I compare a to z , it will always be less by numeric definition. However, if I compare aa with z, then what? Is the numerical translation of the strings -- 0110 0001 0110 0001 0111 1010 equal to TRUE -- I don't think so. Likewise, is the string aaa greater than z -- yep, I can buy that. But, if you hold that aa is less than z, then everything must be less than z (except z stuff). So, the loop would continue until you hit the maximum allowable for strings -- that doesn't sound good. I can't see the logic that says aa is less than z while aaa is greater. That sounds like something our government would dream up. So yes, like I said, it is a bit of a quirk, but there is no good answer to what z++ should be and we certainly don't want to change the default comparison mechanism to not compare strings alphabetically because that would screw up all sorts of stuff including usorts and peoples' expectations. It's just in this case where you have gotten it into your head that incrementing strings is a good thing to do. Oh, I'm not saying to change anything. I've seen and worked with worse. You'd be much better off with a range call to quickly generate a range of characters. You could then loop through that character by character. Or use the chr() function to work with character codes instead. I figured a way around it, I just thought it was odd. Thanks for your insight. tedd -- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
At 12:40 PM -0700 6/4/06, Rasmus Lerdorf wrote: For example, this also works: $filename = file1; $filename++; echo $filename; You would get file2 from this. Think about the amount of code you would need to write in C to make that work? I would rather not. :-) tedd -- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
tedd wrote: At 12:27 PM -0700 6/4/06, Rasmus Lerdorf wrote: tedd wrote: But, what brothers me about the routine, is that is DOES print z where it is supposed to. In other words, the characters a-z are output before continuing with aa and so on. The operation doesn't end with z. Your condition for the loop to continue is $i=z. [1] When $i = y it will obviously continue because y z [2] When $i = z it will obviously continue because z = z [3] When $i = aa it will obviously continue because aa z I agree with [1] and [2], but [3] is where we part company. You see, if you are right, then aaa would also be less than z, but that doesn't appear so. Of course it is. php -r 'echo aaa z;' 1 Not meaning to infer that you don't know this, because I know you do -- so I must be confused. Yes, it is my contention that strings are numerical -- you don't store A in memory, you store 0100 001, or ASCII DEC 65. Likewise a is DEC 97 (0110 0001) and z is DEC 122 (0111 1010) and if I compare a to z , it will always be less by numeric definition. However, if I compare aa with z, then what? Is the numerical translation of the strings -- 0110 0001 0110 0001 0111 1010 equal to TRUE -- I don't think so. No, but we are talking about collation here, not representation. Likewise, is the string aaa greater than z -- yep, I can buy that. Well, it isn't. So the bulk of your rant is rather meaningless. -Rasmus -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
At 1:09 PM -0700 6/4/06, Rasmus Lerdorf wrote:
I agree with [1] and [2], but [3] is where we part company. You see, if you
are right, then aaa would also be less than z, but that doesn't appear so.
Of course it is.
php -r 'echo aaa z;'
1
You missed the point, why does --
for ($i=a; $i=z; $i++)
{
echo($i);
}
-- not continue past aaa? Clearly, if aaa is less than z then why does
the loop stop at yz?
In any event, I'll stop my rant now, I thought we were having a discussion.
tedd
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Re: [PHP] When is z != z ?
On Sun, 2006-06-04 at 16:45, tedd wrote:
At 1:09 PM -0700 6/4/06, Rasmus Lerdorf wrote:
I agree with [1] and [2], but [3] is where we part company. You see, if you
are right, then aaa would also be less than z, but that doesn't appear
so.
Of course it is.
php -r 'echo aaa z;'
1
You missed the point, why does --
for ($i=a; $i=z; $i++)
{
echo($i);
}
-- not continue past aaa? Clearly, if aaa is less than z then why does
the loop stop at yz?
Because right after 'yz' there is 'zz' and 'z' is neither less than nor
equal to 'zz'.
Cheers,
Rob.
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..
| InterJinn Application Framework - http://www.interjinn.com |
::
| An application and templating framework for PHP. Boasting |
| a powerful, scalable system for accessing system services |
| such as forms, properties, sessions, and caches. InterJinn |
| also provides an extremely flexible architecture for |
| creating re-usable components quickly and easily. |
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Re: [PHP] When is z != z ?
On Sun, 2006-06-04 at 16:53, Robert Cummings wrote: -- not continue past aaa? Clearly, if aaa is less than z then why does the loop stop at yz? Because right after 'yz' there is 'zz' and 'z' is neither less than nor equal to 'zz'. Err, that should say 'zz' is neither less than nor equal to 'z' :B Cheers, Rob. -- .. | InterJinn Application Framework - http://www.interjinn.com | :: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
On Sun, 2006-06-04 at 15:10, Martin Alterisio wrote:
Still:
anything ++anything
should be true, or at least that's what they taught me on abstract data
types design, and I think they're right (at least this time)
There's always limitations :)
int main( char *argv[], int argc )
{
int i = 0;
char c = 0x00;
char t = 0x00;
for( i = 0; i 129; i++ )
{
t = c;
++c;
if( t c )
{
printf( Less than!\n );
}
else
{
printf( Not less than!\n );
}
}
return 0;
}
Cheers,
Rob.
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::
| An application and templating framework for PHP. Boasting |
| a powerful, scalable system for accessing system services |
| such as forms, properties, sessions, and caches. InterJinn |
| also provides an extremely flexible architecture for |
| creating re-usable components quickly and easily. |
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[PHP] Garbage collection and strange session behaviour
Hi,
Here is a simple script:
? // BEGIN OF A SCRIPT
/* #1 */ ini_set('session.gc_maxlifetime', '3');
/* #2 */ ini_set('session.gc_probability',1);
/* #3 */ ini_set('session.gc_divisor',1);
/* #4 */ sleep(5);
/* #5 */ session_start();
$sessvar = empty;
if (!isset($_SESSION['a_sess_string'])) { /* #6 */
/* #7 */ $_SESSION['a_sess_string']= abcd;
/* #8 */ echo This is a newly created session, so we put a fresh
variable in it!;
} else {
$sessvar = $_SESSION['a_sess_string'];
/* #9 */ print(We have sessvar = '.$sessvar.' here, so - Is the
session OK??? Maybe, but the session file '/tmp/sess_?' has been
deleted!);
}
/* #10 */ print(br.session_id(). -that's our session id, hmmm);
? // END OF A SCRIPT
The lines from #1 to #3 intentionally set these parameters to the garbage
collector just to speed up the results of the problem.
#4 - we're sleeping
So, after first run we have: after #5 - a new session, #7 puts a variable
in the session and #8 tells us about that.
After #5 we also have the session file /tmp/sess_? written out
there anywhere.
On second run after #5 (we've been sleeping enough on #4 to have our
session announced old, ...dead-man-walking... - quotation from 'The
Green Mile' movie), the gc-monster is awaken and hungry for eating old
session files. Finally we have the session file /tmp/sess_? deleted
by the garbage collector after #5.
That's guaranteed by #1 - #4.
[If we put another 'sleep' after /* #5 */session_start(),
we may have time to switch to '/tmp' directory and persuade ourselves
that there is no session file any more after the execution of #5.]
No session file - no session variables anymore, no session at all???
WRONG ANSWER!
We are sent to the 'else' clause, so $_SESSION['a_sess_string] is set
and alive , and its value - additionally - is the one before the session
file has gone (deleted) - abcd in my example.
Obviously 'session_start()' first fills all of the sesion variables into
memory, and after that shoots the garbage collector to go to finish its
cleaning work. The session file is deleted, but inside the session, in
our script, we are not acquainted with that... Until the end of script we
are happy that everything is all right, but probably this self-confidence
could lead us to some troubles later.
Is there a workaround? Without going to the file system to check if the
file still exists? A smart and elegant PHP session way, without any
if-file-exists-checking functions?
P.S. (To the administrators/moderators/whatever of this mailing list) - Please
tell the people - write it somewhere on http://www.php.net/mailing-lists.php -
that there is no chance to get subscribed if they are using any public mail
address like @yahoo.com. It took me 2 days, I struggled like a pig with a
pumpkin to find out...
-
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Re: [PHP] When is z != z ?
On Sunday 04 June 2006 15:04, tedd wrote: Yes, it is my contention that strings are numerical -- you don't store A in memory, you store 0100 001, or ASCII DEC 65. In a low-level language like C, that matters. One doesn't have strings, one has numbers that happen to map to a symbol. In PHP and other high-level languages, strings are their own datatype. They may or may not even be stored as standard ascii number codes in order internally. You have to think of them as strings, not as numbers. There are no numbers involved here. There are only strings. Likewise a is DEC 97 (0110 0001) and z is DEC 122 (0111 1010) and if I compare a to z , it will always be less by numeric definition. In C or C++, yes. In PHP, do not assume the same string-number mapping. Numeric definition is irrelevant. -- Larry Garfield AIM: LOLG42 [EMAIL PROTECTED] ICQ: 6817012 If nature has made any one thing less susceptible than all others of exclusive property, it is the action of the thinking power called an idea, which an individual may exclusively possess as long as he keeps it to himself; but the moment it is divulged, it forces itself into the possession of every one, and the receiver cannot dispossess himself of it. -- Thomas Jefferson -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
clip There will always be edge cases. Being able to increment strings is pretty handy when you need to create sequences for unique file and directory names. For example, this also works: $filename = file1; $filename++; echo $filename; You would get file2 from this. Think about the amount of code you would need to write in C to make that work? Then change $filename to fileA and increment it. And you get fileB. When we get to fileZ we don't want to go off into unprintable character land, we want to try to stick with the pattern. /clip Hmmm, didnt know about the $filename++; thingy, I used to do things the hard (C) way. Learnt something new...thanks! Cheers, Ryan -- - The faulty interface lies between the chair and the keyboard. - Creativity is great, but plagiarism is faster! - Smile, everyone loves a moron. :-) __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
At 4:53 PM -0400 6/4/06, Robert Cummings wrote: On Sun, 2006-06-04 at 16:45, tedd wrote: -- not continue past aaa? Clearly, if aaa is less than z then why does the loop stop at yz? Because right after 'yz' there is 'zz' and 'z' is neither less than nor equal to 'zz'. and At 4:37 PM -0500 6/4/06, Larry Garfield wrote: On Sunday 04 June 2006 15:04, tedd wrote: Likewise a is DEC 97 (0110 0001) and z is DEC 122 (0111 1010) and if I compare a to z , it will always be less by numeric definition. In C or C++, yes. In PHP, do not assume the same string-number mapping. Numeric definition is irrelevant. It's a sign of genius to make the complicated simple. Learning new things about php every day. Thank you both. tedd PS: Great language. -- thanks Lerdorf. -- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] php, eclipse, dbg, oh my
Eclipse - 3.1.2 Linux - 2.6.16-1.2111_FC4 PHP - 5.1.2, I built it. DBG - 2.13.1, I tried the binary, then built it on my own Apache - 2.0.55, I built it. PHP is running as a module but I've configured Eclipse to use the standard PHP5 executable instead. I wonder if anyone has gotten Eclipse debugging of PHP to work under Linux and if so what was used - dbg or some other tool? I've read pretty much of the available documentation, and tried most of the contained suggestions but nothing has worked yet. A lot of the suggestions are also geared towards windows users running Eclipse on that platform. Everything seems to be firing up but I get no presentation in the debugger screen except for the console which indicates my program ran and all the breakpoints were ignored. Any ideas? Thanks - Tod -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] When is z != z ?
tedd wrote:
At 1:09 PM -0700 6/4/06, Rasmus Lerdorf wrote:
I agree with [1] and [2], but [3] is where we part company. You see, if you are right, then
aaa would also be less than z, but that doesn't appear so.
Of course it is.
php -r 'echo aaa z;'
1
You missed the point, why does --
for ($i=a; $i=z; $i++)
{
echo($i);
}
-- not continue past aaa? Clearly, if aaa is less than z then why does the loop
stop at yz?
I thought I explained that a few times. The sequence is:
a b c ... x y z aa ab ac ... yx yy yz za zb zc ... zy zx zz aaa aab
Your loop stops at yz and doesn't get anywhere near aaa because za z
-Rasmus
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Re: [PHP] When is z != z ?
Larry Garfield wrote: On Sunday 04 June 2006 15:04, tedd wrote: Yes, it is my contention that strings are numerical -- you don't store A in memory, you store 0100 001, or ASCII DEC 65. In a low-level language like C, that matters. One doesn't have strings, one has numbers that happen to map to a symbol. In PHP and other high-level languages, strings are their own datatype. They may or may not even be stored as standard ascii number codes in order internally. You have to think of them as strings, not as numbers. There are no numbers involved here. There are only strings. Likewise a is DEC 97 (0110 0001) and z is DEC 122 (0111 1010) and if I compare a to z , it will always be less by numeric definition. In C or C++, yes. In PHP, do not assume the same string-number mapping. Numeric definition is irrelevant. Right, and now bring Unicode into the picture and this becomes even more true. -Rasmus -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Garbage collection and strange session behaviour
Are you actually hitting this race condition in the real world? With a
decently long maxlifetime setting I can't really see this being a
realistic problem. Remember the timer is reset on every access.
-Rasmus
BNR - IT Department wrote:
Hi,
Here is a simple script:
? // BEGIN OF A SCRIPT
/* #1 */ ini_set('session.gc_maxlifetime', '3');
/* #2 */ ini_set('session.gc_probability',1);
/* #3 */ ini_set('session.gc_divisor',1);
/* #4 */ sleep(5);
/* #5 */ session_start();
$sessvar = empty;
if (!isset($_SESSION['a_sess_string'])) { /* #6 */
/* #7 */ $_SESSION['a_sess_string']= abcd;
/* #8 */ echo This is a newly created session, so we put a fresh
variable in it!;
} else {
$sessvar = $_SESSION['a_sess_string'];
/* #9 */ print(We have sessvar = '.$sessvar.' here, so - Is the
session OK??? Maybe, but the session file '/tmp/sess_?' has been
deleted!);
}
/* #10 */ print(br.session_id(). -that's our session id, hmmm);
? // END OF A SCRIPT
The lines from #1 to #3 intentionally set these parameters to the garbage
collector just to speed up the results of the problem.
#4 - we're sleeping
So, after first run we have: after #5 - a new session, #7 puts a variable
in the session and #8 tells us about that.
After #5 we also have the session file /tmp/sess_? written out
there anywhere.
On second run after #5 (we've been sleeping enough on #4 to have our
session announced old, ...dead-man-walking... - quotation from 'The
Green Mile' movie), the gc-monster is awaken and hungry for eating old
session files. Finally we have the session file /tmp/sess_? deleted
by the garbage collector after #5.
That's guaranteed by #1 - #4.
[If we put another 'sleep' after /* #5 */session_start(),
we may have time to switch to '/tmp' directory and persuade ourselves
that there is no session file any more after the execution of #5.]
No session file - no session variables anymore, no session at all???
WRONG ANSWER!
We are sent to the 'else' clause, so $_SESSION['a_sess_string] is set
and alive , and its value - additionally - is the one before the session
file has gone (deleted) - abcd in my example.
Obviously 'session_start()' first fills all of the sesion variables into
memory, and after that shoots the garbage collector to go to finish its
cleaning work. The session file is deleted, but inside the session, in
our script, we are not acquainted with that... Until the end of script we
are happy that everything is all right, but probably this self-confidence
could lead us to some troubles later.
Is there a workaround? Without going to the file system to check if the
file still exists? A smart and elegant PHP session way, without any
if-file-exists-checking functions?
P.S. (To the administrators/moderators/whatever of this mailing list) - Please
tell the people - write it somewhere on http://www.php.net/mailing-lists.php -
that there is no chance to get subscribed if they are using any public mail
address like @yahoo.com. It took me 2 days, I struggled like a pig with a
pumpkin to find out...
-
Bulgarian National Radio
IT Department
(+359 2) 9336 615
BNR - Sofia, Bulgaria
--
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[PHP] Explicit Stream Flush with fsockopen()
Hi Guys, I know this may sound fundamental to some of you, but do you know any way of explicitly flushing out stream buffers off to the socket using fsockopen()/fputs() combos? Hope to hear from you soon. Note: I'm not using http, and I'm connecting to some other arbitrary port other than http, so I don't know if ob_flush() and its family of functions will work. Thanks! :) -- Oliver John V. Tibi Software Programmer/Web Application Developer IAMD Software Solutions [EMAIL PROTECTED] Live free() or die(). -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Displaying data a certian way.
Ok, here's my issue that I have. Inside my database I have something that look's like this idserveridcabinetidect... - 1 server11 2 server21 3 server31 I am trying to get it to display the servers 1 2 3 under a display bar of cabinet 1. Anybody have any solutions to this? I am a novis to php and mysql but i know the majority of the basics.
Re: [PHP] Displaying data a certian way.
Just to clarify a little more, I want the output to do something like this... -- | Cabinet 1 | -- Server 1 Server 2 Server 3 and so forth... - Original Message - From: Rob W. [EMAIL PROTECTED] To: php-general@lists.php.net Sent: Sunday, June 04, 2006 10:47 PM Subject: [PHP] Displaying data a certian way. Ok, here's my issue that I have. Inside my database I have something that look's like this idserveridcabinetidect... - 1 server11 2 server21 3 server31 I am trying to get it to display the servers 1 2 3 under a display bar of cabinet 1. Anybody have any solutions to this? I am a novis to php and mysql but i know the majority of the basics. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Displaying data a certian way.
Rob W. wrote:
Ok, here's my issue that I have.
Inside my database I have something that look's like this
idserveridcabinetidect...
-
1 server11
2 server21
3 server31
I am trying to get it to display the servers 1 2 3 under a display bar of
cabinet 1.
Anybody have any solutions to this? I am a novis to php and mysql but i know
the majority of the basics.
Remember the previous cabinet and you can use that for checking whether
to display another heading:
$previous_cabinet = '';
while($row = mysql_fetch_assoc($query_result)) {
if ($row['cabinetid'] != $previous_cabinet) {
echo Cabinet id . (int)$row['cabinetid'];
$previous_cabinet = $row['cabinetid'];
}
echo Server . htmlentities($row['serverid']) . br/;
}
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Re: [PHP] Displaying data a certian way.
That worked. Thanks.
- Original Message -
From: Chris [EMAIL PROTECTED]
To: Rob W. [EMAIL PROTECTED]
Cc: php-general@lists.php.net
Sent: Sunday, June 04, 2006 10:59 PM
Subject: Re: [PHP] Displaying data a certian way.
Rob W. wrote:
Ok, here's my issue that I have.
Inside my database I have something that look's like this
idserveridcabinetidect...
-
1 server11
2 server21
3 server31
I am trying to get it to display the servers 1 2 3 under a display bar
of cabinet 1.
Anybody have any solutions to this? I am a novis to php and mysql but i
know the majority of the basics.
Remember the previous cabinet and you can use that for checking whether to
display another heading:
$previous_cabinet = '';
while($row = mysql_fetch_assoc($query_result)) {
if ($row['cabinetid'] != $previous_cabinet) {
echo Cabinet id . (int)$row['cabinetid'];
$previous_cabinet = $row['cabinetid'];
}
echo Server . htmlentities($row['serverid']) . br/;
}
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Re: [PHP] Delete
On 6/4/06, Larry Garfield [EMAIL PROTECTED] wrote: Only if delete.php is a confirmation page. Never ever ever have a delete function that operates solely by GET. Here's why: http://thedailywtf.com/forums/thread/66166.aspx Yes, I've seen that one before. IMO the main problem there is the faulty authentication system. If you put delete links public, and fail to put proper authentication in place, someone's going to delete your content, no matter if the delete action is a POST submit button or a GET link. I don't see how POST is better/more secure for a delete action. Rabin -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Delete
On Monday 05 June 2006 00:41, Rabin Vincent wrote: On 6/4/06, Larry Garfield [EMAIL PROTECTED] wrote: Only if delete.php is a confirmation page. Never ever ever have a delete function that operates solely by GET. Here's why: http://thedailywtf.com/forums/thread/66166.aspx Yes, I've seen that one before. IMO the main problem there is the faulty authentication system. If you put delete links public, and fail to put proper authentication in place, someone's going to delete your content, no matter if the delete action is a POST submit button or a GET link. I don't see how POST is better/more secure for a delete action. Rabin Data-modification actions should always be made via POST, not GET, because they're harder to make by accident that way. They can't be bookmarked or easily picked up by spiders and search engines. GET should be used only for read-only actions. That's what it's for (GETting data). -- Larry Garfield AIM: LOLG42 [EMAIL PROTECTED] ICQ: 6817012 If nature has made any one thing less susceptible than all others of exclusive property, it is the action of the thinking power called an idea, which an individual may exclusively possess as long as he keeps it to himself; but the moment it is divulged, it forces itself into the possession of every one, and the receiver cannot dispossess himself of it. -- Thomas Jefferson -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
