[PHP] PHP and Mysql Limit
I've created a script that reads a sorted mysql query and outputs specific
results into text files defined by the start and limit of mysql. The
database holds 178 records. I want to start my output on #9 with 10
records per page. Should leave me with 17 equal pages right?
$count = 178
$start = 8; (Mysql starts at record 0)
$per_page = 10;
$page = 1;
while ($start = $count) {
$fp = fopen(Page$page.txt, w);
mysql_connect ($host, $user, $pass);
mysql_select_db ($database);
$result = mysql_query (SELECT * FROM internal_listings, agents WHERE
internal_listings.agent = agents.name AND category = 'Standard' ORDER by
area,price LIMIT $start, $per_page);
if ($row = mysql_fetch_array($result)) {
do {
##misc ouput to file $fp for 10 records in query
}
while($row = mysql_fetch_array($result));
}
fclose($fp);
mysql_close();
$start = $start + $per_page;
$page++;
}
When I run the script outlined above I get 18 pages. Page number 18 is
blank as it should be as there should be no more listings to output to a
text file but why is there a page number 18 to begin with? It should end
with page number 17.
Thanks in advance for any insight,
Ed
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Re: [PHP] PHP and Mysql Limit
It looks like your adding 10 to 8 thus getting 18... of course I maybe
looking at this wrong
- Original Message -
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, July 02, 2003 9:23 AM
Subject: [PHP] PHP and Mysql Limit
I've created a script that reads a sorted mysql query and outputs specific
results into text files defined by the start and limit of mysql. The
database holds 178 records. I want to start my output on #9 with 10
records per page. Should leave me with 17 equal pages right?
$count = 178
$start = 8; (Mysql starts at record 0)
$per_page = 10;
$page = 1;
while ($start = $count) {
$fp = fopen(Page$page.txt, w);
mysql_connect ($host, $user, $pass);
mysql_select_db ($database);
$result = mysql_query (SELECT * FROM internal_listings, agents WHERE
internal_listings.agent = agents.name AND category = 'Standard' ORDER by
area,price LIMIT $start, $per_page);
if ($row = mysql_fetch_array($result)) {
do {
##misc ouput to file $fp for 10 records in query
}
while($row = mysql_fetch_array($result));
}
fclose($fp);
mysql_close();
$start = $start + $per_page;
$page++;
}
When I run the script outlined above I get 18 pages. Page number 18 is
blank as it should be as there should be no more listings to output to a
text file but why is there a page number 18 to begin with? It should end
with page number 17.
Thanks in advance for any insight,
Ed
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Re: [PHP] PHP and Mysql Limit
|- Original Message -
|From: [EMAIL PROTECTED]
|To: [EMAIL PROTECTED]
|Sent: Wednesday, July 02, 2003 9:23 AM
|Subject: [PHP] PHP and Mysql Limit
|
|
|
| I've created a script that reads a sorted mysql query and outputs specific
| results into text files defined by the start and limit of mysql. The
| database holds 178 records. I want to start my output on #9 with 10
| records per page. Should leave me with 17 equal pages right?
|
| $count = 178
| $start = 8; (Mysql starts at record 0)
| $per_page = 10;
| $page = 1;
|
| while ($start = $count) {
|
| $fp = fopen(Page$page.txt, w);
[snip]
On Jul 2, 2003, Chris Sherwood claimed that:
|It looks like your adding 10 to 8 thus getting 18... of course I maybe
|looking at this wrong
|
Then, once you've done it enough times, $start = $count = 178.
[code]
while ($start = $count) {
// when $start = $count = 178, you won't retrive any data
[/code]
I would probably also move as much of the mysql_connect as possible to
outside the loop. It only needs to be done once.
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Re: [PHP] PHP and Mysql Limit
Yes, the next page of results would start at #18. The page number only
increments by 1.
Ed
On Wed, 2 Jul 2003, Chris Sherwood wrote:
It looks like your adding 10 to 8 thus getting 18... of course I maybe
looking at this wrong
- Original Message -
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, July 02, 2003 9:23 AM
Subject: [PHP] PHP and Mysql Limit
I've created a script that reads a sorted mysql query and outputs specific
results into text files defined by the start and limit of mysql. The
database holds 178 records. I want to start my output on #9 with 10
records per page. Should leave me with 17 equal pages right?
$count = 178
$start = 8; (Mysql starts at record 0)
$per_page = 10;
$page = 1;
while ($start = $count) {
$fp = fopen(Page$page.txt, w);
mysql_connect ($host, $user, $pass);
mysql_select_db ($database);
$result = mysql_query (SELECT * FROM internal_listings, agents WHERE
internal_listings.agent = agents.name AND category = 'Standard' ORDER by
area,price LIMIT $start, $per_page);
if ($row = mysql_fetch_array($result)) {
do {
##misc ouput to file $fp for 10 records in query
}
while($row = mysql_fetch_array($result));
}
fclose($fp);
mysql_close();
$start = $start + $per_page;
$page++;
}
When I run the script outlined above I get 18 pages. Page number 18 is
blank as it should be as there should be no more listings to output to a
text file but why is there a page number 18 to begin with? It should end
with page number 17.
Thanks in advance for any insight,
Ed
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Re: [PHP] PHP and Mysql Limit
On Wed, 2 Jul 2003, Jeff Harris wrote:
Then, once you've done it enough times, $start = $count = 178.
[code]
while ($start = $count) {
// when $start = $count = 178, you won't retrive any data
[/code]
The recordset would not alway contain an even number of records resulting
in 10 records per page. It may contain something like 1027 records which
should then produce 103 pages. 102 pages each with 10 records and one page
of only 7 records.
Ed
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