php-general Digest 1 Mar 2009 17:53:53 -0000 Issue 5986
Topics (messages 289003 through 289018):
file locking...
289003 by: bruce
289004 by: Ashley Sheridan
289008 by: Robert Cummings
289017 by: bruce
289018 by: Robert Cummings
Re: "use strict" or similar in PHP?
289005 by: Jim Lucas
289007 by: Robert Cummings
289009 by: tedd
289012 by: Robert Cummings
289014 by: tedd
289015 by: Robert Cummings
289016 by: Robert Cummings
www.soongy.com
289006 by: Gevorg Harutyunyan
289010 by: tedd
289011 by: Nitsan Bin-Nun
289013 by: tedd
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--- Begin Message ---
Hi.
Got a bit of a question/issue that I'm trying to resolve. I'm asking this of
a few groups so bear with me.
I'm considering a situation where I have multiple processes running, and
each process is going to access a number of files in a dir. Each process
accesses a unique group of files, and then writes the group of files to
another dir. I can easily handle this by using a form of locking, where I
have the processes lock/read a file and only access the group of files in
the dir based on the open/free status of the lockfile.
However, the issue with the approach is that it's somewhat synchronous. I'm
looking for something that might be more asynchronous/parallel, in that I'd
like to have multiple processes each access a unique group of files from the
given dir as fast as possible.
So.. Any thoughts/pointers/comments would be greatly appreciated. Any
pointers to academic research, etc.. would be useful.
thanks
--- End Message ---
--- Begin Message ---
On Sat, 2009-02-28 at 21:46 -0800, bruce wrote:
> Hi.
>
> Got a bit of a question/issue that I'm trying to resolve. I'm asking this of
> a few groups so bear with me.
>
> I'm considering a situation where I have multiple processes running, and
> each process is going to access a number of files in a dir. Each process
> accesses a unique group of files, and then writes the group of files to
> another dir. I can easily handle this by using a form of locking, where I
> have the processes lock/read a file and only access the group of files in
> the dir based on the open/free status of the lockfile.
>
> However, the issue with the approach is that it's somewhat synchronous. I'm
> looking for something that might be more asynchronous/parallel, in that I'd
> like to have multiple processes each access a unique group of files from the
> given dir as fast as possible.
>
> So.. Any thoughts/pointers/comments would be greatly appreciated. Any
> pointers to academic research, etc.. would be useful.
>
> thanks
>
>
>
>
You could do it one of several ways:
1. Have the files actually written to a subversion/git repository, and
let that handle differences.
2. Store the files in a database as blobs
3. Do something clever with filename suffixes to indicate versions of
the file
Ash
www.ashleysheridan.co.uk
--- End Message ---
--- Begin Message ---
On Sat, 2009-02-28 at 21:46 -0800, bruce wrote:
> Hi.
>
> Got a bit of a question/issue that I'm trying to resolve. I'm asking this of
> a few groups so bear with me.
>
> I'm considering a situation where I have multiple processes running, and
> each process is going to access a number of files in a dir. Each process
> accesses a unique group of files, and then writes the group of files to
> another dir. I can easily handle this by using a form of locking, where I
> have the processes lock/read a file and only access the group of files in
> the dir based on the open/free status of the lockfile.
>
> However, the issue with the approach is that it's somewhat synchronous. I'm
> looking for something that might be more asynchronous/parallel, in that I'd
> like to have multiple processes each access a unique group of files from the
> given dir as fast as possible.
>
> So.. Any thoughts/pointers/comments would be greatly appreciated. Any
> pointers to academic research, etc.. would be useful.
Threads? Or spawn off child processes. Maybe I'm not understanding your
issues well enough.
Cheers,
Rob.
--
http://www.interjinn.com
Application and Templating Framework for PHP
--- End Message ---
--- Begin Message ---
hi rob...
here's the issue in more detail..
i have multiple processes that are generated/created and run in a
simultaneous manner. each process wants to get XX number of files from the
same batch of files... assume i have a batch of 50,000 files. my issue is
how do i allow each of the processes to get their batch of unique files as
fast as possible. (the 50K number is an arbotrary number.. my project will
shrink/expand over time...
if i dump all the 50K files in the same dir, i can have a lock file that
would allow each process to sequentially read/write the lock file, and then
access the dir to get the XX files the process is needing. (each process is
just looking to get the next batch of files for processing. there's no
searching based on text in the name of the files. it's a kind of fifo queing
system) this approach could work, but it's basically sequential, and could
in theory get into race conditions regarding the lockfile.
i could also have the process that creates the files, throw the files in
some kind of multiple directory processes, where i split the 50K files into
separate dirs and somehow implement logic to allow the cient process to
fetch the files from the unique/separate dirs.. but this could get ugly.
so my issue is essentially how can i allow as close to simultaneous access
by client/child processes to a kind of FIFO of files...
whatever logic i create for this process, will also be used for the next
iteration of the project, where i get rid of the files.. and i use some sort
of database as the informational storage.
hopefully this provides a little more clarity.
thanks
-----Original Message-----
From: Robert Cummings [mailto:[email protected]]
Sent: Sunday, March 01, 2009 2:50 AM
To: bruce
Cc: [email protected]
Subject: Re: [PHP] file locking...
On Sat, 2009-02-28 at 21:46 -0800, bruce wrote:
> Hi.
>
> Got a bit of a question/issue that I'm trying to resolve. I'm asking this
of
> a few groups so bear with me.
>
> I'm considering a situation where I have multiple processes running, and
> each process is going to access a number of files in a dir. Each process
> accesses a unique group of files, and then writes the group of files to
> another dir. I can easily handle this by using a form of locking, where I
> have the processes lock/read a file and only access the group of files in
> the dir based on the open/free status of the lockfile.
>
> However, the issue with the approach is that it's somewhat synchronous.
I'm
> looking for something that might be more asynchronous/parallel, in that
I'd
> like to have multiple processes each access a unique group of files from
the
> given dir as fast as possible.
>
> So.. Any thoughts/pointers/comments would be greatly appreciated. Any
> pointers to academic research, etc.. would be useful.
Threads? Or spawn off child processes. Maybe I'm not understanding your
issues well enough.
Cheers,
Rob.
--
http://www.interjinn.com
Application and Templating Framework for PHP
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
--- End Message ---
--- Begin Message ---
On Sun, 2009-03-01 at 09:09 -0800, bruce wrote:
> hi rob...
>
> here's the issue in more detail..
>
> i have multiple processes that are generated/created and run in a
> simultaneous manner. each process wants to get XX number of files from the
> same batch of files... assume i have a batch of 50,000 files. my issue is
> how do i allow each of the processes to get their batch of unique files as
> fast as possible. (the 50K number is an arbotrary number.. my project will
> shrink/expand over time...
>
> if i dump all the 50K files in the same dir, i can have a lock file that
> would allow each process to sequentially read/write the lock file, and then
> access the dir to get the XX files the process is needing. (each process is
> just looking to get the next batch of files for processing. there's no
> searching based on text in the name of the files. it's a kind of fifo queing
> system) this approach could work, but it's basically sequential, and could
> in theory get into race conditions regarding the lockfile.
>
> i could also have the process that creates the files, throw the files in
> some kind of multiple directory processes, where i split the 50K files into
> separate dirs and somehow implement logic to allow the cient process to
> fetch the files from the unique/separate dirs.. but this could get ugly.
>
> so my issue is essentially how can i allow as close to simultaneous access
> by client/child processes to a kind of FIFO of files...
>
> whatever logic i create for this process, will also be used for the next
> iteration of the project, where i get rid of the files.. and i use some sort
> of database as the informational storage.
>
> hopefully this provides a little more clarity.
Would I be right in assuming that a process grabs X of the oldest
available files and then begins to work on them. Then the next process
would essentially grab the next X oldest files so on and so forth over
and over again? Also is the file discarded once processed? Would I be
correct in presuming that processing of the files takes longer than
grabbing the files wanted? If so then I would have a single lock upon
which all processes wait. Each process grabs the lock when it can and
then moves X oldest files to a working directory where it can then
process them.
So... directory structure:
/ROOT
/ROOT/queue
/ROOT/work
Locks...
/ROOT/lock
So let's say you have 500 files:
/ROOT/queue/file_001.dat
/ROOT/queue/file_002.dat
/ROOT/queue/file_003.dat
...
/ROOT/queue/file_499.dat
/ROOT/queue/file_500.dat
And you have 5 processes...
/proc/1
/proc/2
/proc/3
/proc/4
/proc/5
Now to start all processes try to grab the lock at the same time, by
virtue of lock mechanics only one process gets the lock... let's say for
instance 4.... While 4 has the lock all the other processes go to sleep
for say... 10000 usecs... upon failing to get the lock.
So process 4 transfers file_001.dat through to file_050.dat
into /ROOT/work.
/ROOT/work/file_001.dat
/ROOT/work/file_002.dat
/ROOT/work/file_003.dat
...
/ROOT/work/file_049.dat
/ROOT/work/file_050.dat
Then it releases the lock and begins processing.... meanwhile the other
processes wake up and try to grab the lock again... this time PID 2 gets
it. It does the same...
/ROOT/work/file_043.dat
/ROOT/work/file_044.dat
/ROOT/work/file_045.dat
...
/ROOT/work/file_049.dat
/ROOT/work/file_100.dat
/ROOT/queue/file_101.dat
/ROOT/queue/file_102.dat
/ROOT/queue/file_103.dat
...
/ROOT/queue/file_499.dat
/ROOT/queue/file_500.dat
Now while it was doing that PID 4 finished and all it's files are now
deleted. The first thing it does is try to get the lock so it can get
more... but it's still owned by PID 2 so PID 4 goes to sleep. Once PID 2
gets it's files it releases the lock and off it goes and the cycle
continued. Now there's still an issue with respect to incoming partially
written files. During the incoming process those should be written
elsewhere... lets say /ROOT/incoming. Once writing of the file is
complete it can be moved to /ROOT/queue. Also if you don't want
processes to delete the files you can have yet another
directory /ROOT/processed. So with everything considered here's your
directory structure:
/ROOT
/ROOT/incoming
/ROOT/processed
/ROOT/queue
/ROOT/work
One last thing to consider is that if there are no available files on
which to work then you might have your processes sleep a little longer.
Cheers,
Rob.
--
http://www.interjinn.com
Application and Templating Framework for PHP
--- End Message ---
--- Begin Message ---
Stuart wrote:
2009/3/1 Shawn McKenzie <[email protected]>
Stuart wrote:
2009/2/28 Shawn McKenzie <[email protected]>
Robert Cummings wrote:
On Sat, 2009-02-28 at 00:11 +0000, Ashley Sheridan wrote:
On Fri, 2009-02-27 at 14:32 -0500, Robert Cummings wrote:
On Sat, 2009-02-28 at 00:02 +0600, 9el wrote:
-----------------------------------------------------------------------
Use FreeOpenSourceSoftwares, Stop piracy, Let the developers live.
Get
a Free CD of Ubuntu mailed to your door without any cost. Visit :
www.ubuntu.com
----------------------------------------------------------------------
On Fri, Feb 27, 2009 at 11:46 PM, Robert Cummings <
[email protected]>wrote:
On Fri, 2009-02-27 at 09:28 -0700, LuKreme wrote:
On Feb 27, 2009, at 6:12, Hans Schultz <[email protected]>
wrote:
Hahahah,I was thinking the same thing
The trouble is most people mean "compile a source file to an
executable binary" when they sat compile. By this measure, PHP
does
not compile.
I add the following to the top of my PHP shell scripts:
#!/usr/bin/php -qC
Then I do the following:
chmod 775 script.php
Then I run it as follows:
./script.php
Look... and executable binary :) Don't say it's not binary. All
data
on
a hard disk is binary (although I do know what you mean ;)
Well you are running shell script style execution its not example of
Compiled code or Binary
The data in the file is ASCII or UTF text :)
Which are subsets of binary representation ;)
Compilation happens when its zendOptimized or OpCoded. Its then is
converted
into binary content file.
But one could probably quite easily set up a system whereby
eAccelerator
or APC or Zend Optimizer cache bytecodes are torn from a file run
similarly. As I said in an earlier post... the line between the
definition of interpreted language and compiled language is quite
blurry
these days.
Cheers,
Rob.
--
http://www.interjinn.com
Application and Templating Framework for PHP
ASCII is only a subset of binary in a pedantic, literal sense. When
people say binary file, they mean one that contains characters which
are
outside the normal display spectrum, such as chr(0), etc.
And the argument that PHP is not compiled requires a certain level of
pedantry and it is still an incorrect argument since it most certainly
is compiled to an intermediary virtual machine code.
Cheers,
Rob.
Still, in PHP $compile_time == $run_time.
I haven't been following this thread, but this caught my eye as being
completely wrong. There are distinct compile and execution phases when
PHP
runs a script, and different rules apply to each. If you don't believe me
try defaulting the value of a class variable to the result of a function.
-Stuart
Rob, I wasn't talking about time. I was talking about they're pretty
much the same as in when they execute.
Stuart,
Great, then show the OP how he can enforce strict error checking at
compile time and halt compilation and runtime altogether.
Like I said I haven't been following this thread so have no idea what the
original question was. I was just pointing out that your assertion
that $compile_time == $run_time is incorrect.
As far as error checking goes the PHP engine performs syntactical checks
during compile time but due to the highly flexible nature of the language
it's not possible to do most error checking until runtime.
-Stuart
And I quote:
Hello,
I am beginner with PHP and prior to PHP I have worked with java for some time
and with perl for very short period. I can't help to notice some things that
are little annoyance for me with PHP, but I am sure someone more experienced
can help me :-)
Is there in PHP something like "use strict" from perl? I find it pretty
annoying to need to run script over and over again just to find out that I
made typo in variable name.
Is there some way for PHP to cache some data on the page? I like very much
PHP's speed but it would be even better to be able to cache some frequently
used data from database?
Also regarding databases, I liked a lot java's way of sending data to database
using parameters ("select * from user where username = ?" and then passing
parameter separately with database doing necessary escaping and everything).
Is there something like PHPDBC similar to JDBC?
TIA,
Hans
End Quote;
Jim Lucas
--- End Message ---
--- Begin Message ---
On Sat, 2009-02-28 at 18:57 -0600, Shawn McKenzie wrote:
> Stuart wrote:
> > 2009/2/28 Shawn McKenzie <[email protected]>
> >
> >> Robert Cummings wrote:
> >>> On Sat, 2009-02-28 at 00:11 +0000, Ashley Sheridan wrote:
> >>>> On Fri, 2009-02-27 at 14:32 -0500, Robert Cummings wrote:
> >>>>> On Sat, 2009-02-28 at 00:02 +0600, 9el wrote:
> >> -----------------------------------------------------------------------
> >>>>>> Use FreeOpenSourceSoftwares, Stop piracy, Let the developers live. Get
> >>>>>> a Free CD of Ubuntu mailed to your door without any cost. Visit :
> >>>>>> www.ubuntu.com
> >>>>>> ----------------------------------------------------------------------
> >>>>>>
> >>>>>>
> >>>>>> On Fri, Feb 27, 2009 at 11:46 PM, Robert Cummings <
> >> [email protected]>wrote:
> >>>>>>> On Fri, 2009-02-27 at 09:28 -0700, LuKreme wrote:
> >>>>>>>> On Feb 27, 2009, at 6:12, Hans Schultz <[email protected]>
> >> wrote:
> >>>>>>>>> Hahahah,I was thinking the same thing
> >>>>>>>> The trouble is most people mean "compile a source file to an
> >>>>>>>> executable binary" when they sat compile. By this measure, PHP does
> >>>>>>>> not compile.
> >>>>>>> I add the following to the top of my PHP shell scripts:
> >>>>>>>
> >>>>>>> #!/usr/bin/php -qC
> >>>>>>>
> >>>>>>> Then I do the following:
> >>>>>>>
> >>>>>>> chmod 775 script.php
> >>>>>>>
> >>>>>>> Then I run it as follows:
> >>>>>>>
> >>>>>>> ./script.php
> >>>>>>>
> >>>>>>> Look... and executable binary :) Don't say it's not binary. All data
> >> on
> >>>>>>> a hard disk is binary (although I do know what you mean ;)
> >>>>>> Well you are running shell script style execution its not example of
> >>>>>> Compiled code or Binary
> >>>>>>
> >>>>>> The data in the file is ASCII or UTF text :)
> >>>>> Which are subsets of binary representation ;)
> >>>>>
> >>>>>> Compilation happens when its zendOptimized or OpCoded. Its then is
> >> converted
> >>>>>> into binary content file.
> >>>>> But one could probably quite easily set up a system whereby
> >> eAccelerator
> >>>>> or APC or Zend Optimizer cache bytecodes are torn from a file run
> >>>>> similarly. As I said in an earlier post... the line between the
> >>>>> definition of interpreted language and compiled language is quite
> >> blurry
> >>>>> these days.
> >>>>>
> >>>>> Cheers,
> >>>>> Rob.
> >>>>> --
> >>>>> http://www.interjinn.com
> >>>>> Application and Templating Framework for PHP
> >>>>>
> >>>>>
> >>>> ASCII is only a subset of binary in a pedantic, literal sense. When
> >>>> people say binary file, they mean one that contains characters which are
> >>>> outside the normal display spectrum, such as chr(0), etc.
> >>> And the argument that PHP is not compiled requires a certain level of
> >>> pedantry and it is still an incorrect argument since it most certainly
> >>> is compiled to an intermediary virtual machine code.
> >>>
> >>> Cheers,
> >>> Rob.
> >> Still, in PHP $compile_time == $run_time.
> >
> >
> > I haven't been following this thread, but this caught my eye as being
> > completely wrong. There are distinct compile and execution phases when PHP
> > runs a script, and different rules apply to each. If you don't believe me
> > try defaulting the value of a class variable to the result of a function.
> >
> > -Stuart
> >
> Rob, I wasn't talking about time. I was talking about they're pretty
> much the same as in when they execute.
They're not if you're using a compile cache.
Cheers,
Rob.
--
http://www.interjinn.com
Application and Templating Framework for PHP
--- End Message ---
--- Begin Message ---
The OP asked:
Is there in PHP something like "use strict" from perl? I find it pretty
annoying to need to run script over and over again just to find out that I
made typo in variable name.
And I've been waiting for an answer myself, but I haven't seen one.
From what I remember, in perl if you use "use strict;" it requires to
to define your variables (my) before using them. If you make a
variable typo in your code, then you'll trigger an error when you try
to run it.
From what I've seen of php, even with using strict error reporting,
you can do that all day long without generating an error.
So the answer appears to be "No, you can't do that in PHP." Is that the answer?
Cheers,
tedd
--
-------
http://sperling.com http://ancientstones.com http://earthstones.com
--- End Message ---
--- Begin Message ---
On Sun, 2009-03-01 at 08:36 -0500, tedd wrote:
> The OP asked:
>
> >Is there in PHP something like "use strict" from perl? I find it pretty
> >annoying to need to run script over and over again just to find out that I
> >made typo in variable name.
>
> And I've been waiting for an answer myself, but I haven't seen one.
>
> From what I remember, in perl if you use "use strict;" it requires to
> to define your variables (my) before using them. If you make a
> variable typo in your code, then you'll trigger an error when you try
> to run it.
>
> From what I've seen of php, even with using strict error reporting,
> you can do that all day long without generating an error.
>
> So the answer appears to be "No, you can't do that in PHP." Is that the
> answer?
You can do anything you want... :)
<?php
class StrictProps
{
private $___init = true;
function StrictProps( $props )
{
$propsList = func_get_args();
foreach( $propsList as $props )
{
if( is_array( $props ) )
{
foreach( $props as $prop => $init )
{
$this->{$prop} = $init;
}
}
else
{
$this->{$props} = null;
}
}
$this->___init = false;
}
function __set( $name, $value )
{
if( !$this->___init )
{
die( 'Attempt to set non-existent property: '
.get_class( $this ).'->'.$name."\n" );
}
$this->{$name} = $value;
}
function __get( $name )
{
die( 'Attempt to get non-existent property: '
.get_class( $this ).'->'.$name."\n" );
}
}
//
// Declare strict properties...
//
$my = new StrictProps( 'foo', 'fee', 'fii' );
print_r( $my );
//
// Declare and intialize strict properties...
//
$my = new StrictProps( array( 'foo' => 'Foo1', 'fee' => 'Fee1' ) );
print_r( $my );
echo $my->foo."\n";
echo $my->fee."\n";
echo $my->blah."\n";
?>
Cheers,
Rob.
--
http://www.interjinn.com
Application and Templating Framework for PHP
--- End Message ---
--- Begin Message ---
At 9:21 AM -0500 3/1/09, Robert Cummings wrote:
On Sun, 2009-03-01 at 08:36 -0500, tedd wrote:
The OP asked:
>Is there in PHP something like "use strict" from perl? I find it pretty
>annoying to need to run script over and over again just to find out that I
>made typo in variable name.
And I've been waiting for an answer myself, but I haven't seen one.
From what I remember, in perl if you use "use strict;" it requires to
to define your variables (my) before using them. If you make a
variable typo in your code, then you'll trigger an error when you try
to run it.
From what I've seen of php, even with using strict error reporting,
you can do that all day long without generating an error.
So the answer appears to be "No, you can't do that in PHP." Is
that the answer?
You can do anything you want... :)
Rob:
Just to show that your words of wisdom don't go unnoticed, see here:
http://php1.net/oop/strict/
That's pretty slick.
Now if I only understood WT* you did, I would be a better programmer for it.
Thanks,
tedd
--
-------
http://sperling.com http://ancientstones.com http://earthstones.com
--- End Message ---
--- Begin Message ---
On Sun, 2009-03-01 at 09:48 -0500, tedd wrote:
> At 9:21 AM -0500 3/1/09, Robert Cummings wrote:
> >On Sun, 2009-03-01 at 08:36 -0500, tedd wrote:
> >> The OP asked:
> >>
> >> >Is there in PHP something like "use strict" from perl? I find it pretty
> >> >annoying to need to run script over and over again just to find out that
> >> I
> >> >made typo in variable name.
> >>
> >> And I've been waiting for an answer myself, but I haven't seen one.
> >>
> >> From what I remember, in perl if you use "use strict;" it requires to
> >> to define your variables (my) before using them. If you make a
> >> variable typo in your code, then you'll trigger an error when you try
> >> to run it.
> >>
> >> From what I've seen of php, even with using strict error reporting,
> >> you can do that all day long without generating an error.
> >>
> >> So the answer appears to be "No, you can't do that in PHP." Is
> >>that the answer?
> >
> >You can do anything you want... :)
>
> Rob:
>
> Just to show that your words of wisdom don't go unnoticed, see here:
>
> http://php1.net/oop/strict/
>
> That's pretty slick.
>
> Now if I only understood WT* you did, I would be a better programmer for it.
I used the magic methods __set() and __get() to facilitate error
handling. These methods fire when a property is not accessible. So when
the property does not exist these will fire. So first we init the
properties when we create an instance (I'll discuss this shortly)... to
init them we are setting them, this fires the __set() method... but
since we check the value of the private ___init property, we don't fire
an error in this instance. Future requests for the properties will not
incurr a hit to __set() or __get() as long as the property is defined.
If it is not defined then voila, the error fires and we die (we could do
anything such as fire an exception but I just die for the example).
With respect to initialization I use func_get_args() so that an
arbitrary number of parameters can be passed to the constructor. This is
useful since we don't know the number of properties. I also check if an
argument is an array. If it is an array then I treat it as a property
with an initialized value and create and set the property accordingly.
That's all there is to it.
Cheers,
Rob.
--
http://www.interjinn.com
Application and Templating Framework for PHP
--- End Message ---
--- Begin Message ---
On Sun, 2009-03-01 at 09:57 -0500, Robert Cummings wrote:
> On Sun, 2009-03-01 at 09:48 -0500, tedd wrote:
> > At 9:21 AM -0500 3/1/09, Robert Cummings wrote:
> > >On Sun, 2009-03-01 at 08:36 -0500, tedd wrote:
> > >> The OP asked:
> > >>
> > >> >Is there in PHP something like "use strict" from perl? I find it pretty
> > >> >annoying to need to run script over and over again just to find out
> > >> that I
> > >> >made typo in variable name.
> > >>
> > >> And I've been waiting for an answer myself, but I haven't seen one.
> > >>
> > >> From what I remember, in perl if you use "use strict;" it requires to
> > >> to define your variables (my) before using them. If you make a
> > >> variable typo in your code, then you'll trigger an error when you try
> > >> to run it.
> > >>
> > >> From what I've seen of php, even with using strict error reporting,
> > >> you can do that all day long without generating an error.
> > >>
> > >> So the answer appears to be "No, you can't do that in PHP." Is
> > >>that the answer?
> > >
> > >You can do anything you want... :)
> >
> > Rob:
> >
> > Just to show that your words of wisdom don't go unnoticed, see here:
> >
> > http://php1.net/oop/strict/
> >
> > That's pretty slick.
> >
> > Now if I only understood WT* you did, I would be a better programmer for it.
>
> I used the magic methods __set() and __get() to facilitate error
> handling. These methods fire when a property is not accessible. So when
> the property does not exist these will fire. So first we init the
> properties when we create an instance (I'll discuss this shortly)... to
> init them we are setting them, this fires the __set() method... but
> since we check the value of the private ___init property, we don't fire
> an error in this instance. Future requests for the properties will not
> incurr a hit to __set() or __get() as long as the property is defined.
> If it is not defined then voila, the error fires and we die (we could do
> anything such as fire an exception but I just die for the example).
>
> With respect to initialization I use func_get_args() so that an
> arbitrary number of parameters can be passed to the constructor. This is
> useful since we don't know the number of properties. I also check if an
> argument is an array. If it is an array then I treat it as a property
> with an initialized value and create and set the property accordingly.
>
> That's all there is to it.
Oh, I didn't bother, but if someone finds this at all useful, they could
use debug_backtrace() to walk the call stack and output the actual
source file and line number where the illegal property was requested.
Cheers,
Rob.
--
http://www.interjinn.com
Application and Templating Framework for PHP
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--- Begin Message ---
Hi guys
I need to create file upload progress bar using PHP and AJAX. I found two
Pecl extensions that support that may be used: "uploadprogress" and
"php-apc".
I asked my shared hosting provider to add that extensions, but my request
was declined, because "uploadprogress" is still BETA version and "php-apc"
dont works
fine with Fast-CGI version of PHP.
Had you similar problem or do you know how else can I track upload progress?
Btw site is www.soongy.com
Thanks for help
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--- Begin Message ---
At 2:20 PM +0400 3/1/09, Gevorg Harutyunyan wrote:
Hi guys
I need to create file upload progress bar using PHP and AJAX. I found two
Pecl extensions that support that may be used: "uploadprogress" and
"php-apc".
I asked my shared hosting provider to add that extensions, but my request
was declined, because "uploadprogress" is still BETA version and "php-apc"
dont works
fine with Fast-CGI version of PHP.
Had you similar problem or do you know how else can I track upload progress?
Gevorg:
I'm sure this isn't the answer you want, but I went that route
several times and never found a better solution than this:
http://webbytedd.com/bb/wait/
Throw up a "wait" graphic and allow the process to take it's course
without intervention.
If you want to programmatically determine over time how much of the
file has been uploaded and update a progress bar, then you're in for
quite the learning experience.
Cheers,
tedd
PS: After everything is said and done, you may steal any of the
graphics I provide above -- I stole them fair and square myself.
Number 39 is not a wait graphic, it just assumed me.
--
-------
http://sperling.com http://ancientstones.com http://earthstones.com
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--- Begin Message ---
There is no need to go that far, try to google a bit about swfupload.
In short, this is a flash & javascript component that give's you the ability
to maintain the upload, get the current speed, get the current amount of
uploaded data, etc. It is very simple and works like a charm on a dedi
server. There are some issues on shared server sometimes, but even these
things are not that much complicated and can be easily solved.
HTH,
Nitsan
On Sun, Mar 1, 2009 at 4:09 PM, tedd <[email protected]> wrote:
> At 2:20 PM +0400 3/1/09, Gevorg Harutyunyan wrote:
>
>> Hi guys
>>
>> I need to create file upload progress bar using PHP and AJAX. I found two
>> Pecl extensions that support that may be used: "uploadprogress" and
>> "php-apc".
>> I asked my shared hosting provider to add that extensions, but my request
>> was declined, because "uploadprogress" is still BETA version and "php-apc"
>> dont works
>> fine with Fast-CGI version of PHP.
>>
>> Had you similar problem or do you know how else can I track upload
>> progress?
>>
>
> Gevorg:
>
> I'm sure this isn't the answer you want, but I went that route several
> times and never found a better solution than this:
>
> http://webbytedd.com/bb/wait/
>
> Throw up a "wait" graphic and allow the process to take it's course without
> intervention.
>
> If you want to programmatically determine over time how much of the file
> has been uploaded and update a progress bar, then you're in for quite the
> learning experience.
>
> Cheers,
>
> tedd
>
> PS: After everything is said and done, you may steal any of the graphics I
> provide above -- I stole them fair and square myself. Number 39 is not a
> wait graphic, it just assumed me.
>
> --
> -------
> 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
>
>
--- End Message ---
--- Begin Message ---
At 4:17 PM +0200 3/1/09, Nitsan Bin-Nun wrote:
There is no need to go that far, try to google a bit about swfupload.
In short, this is a flash & javascript component that give's you the
ability to maintain the upload, get the current speed, get the
current amount of uploaded data, etc. It is very simple and works
like a charm on a dedi server. There are some issues on shared
server sometimes, but even these things are not that much
complicated and can be easily solved.
HTH,
Nitsan
Oh yeah, try this:
http://swfupload.org/documentation/demonstration
and go through the "up" link -- and then try the "See it in action!"
link and also try the "Demonstration" link. You can even use the
demo.swfupload.org link, which will provide you with this:
http://demo.swfupload.org/v220beta5/index.htm
All of which is well worth the effort if you're trying to waste your
time. If their code is as good as their web site, no thanks -- I'll
pass.
But if I was to seriously investigate it, I would go directly to Google:
http://code.google.com/p/swfupload/
However, I haven't a clue as to if it works or not.
Cheers,
tedd
--
-------
http://sperling.com http://ancientstones.com http://earthstones.com
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