CODEWITHSUNDEEP
phpjquery
David
David

Reputation: 11

php cache function not working on jquery .load()

I'm using a standard php cache script on page.php

   $cache = 'the_location/'.$id.'.html';
   $expire = time() -3600 ; 
   if(file_exists($cache) && filemtime($cache) > $expire)
   {
    readfile($cache);
   } else {
   ob_start();
   // some stuff
   $pages = ob_get_contents();         
   ob_end_flush();         
           $fd = fopen("$cache", "w");
     if ($fd) {
           fwrite($fd,$pages);
        fclose($fd);
   }
    echo $pages ; }

On main_page.php I'm loading page.php like so:

   $('#div').load('page.php?id=' + id);

If I go straight to page.php?id=1234 the page is cached and file 1234.html appears in 'the_location' Otherwise on main_page.php nothing happens ...

Help is much appreciated !

Edit : Everything works on main_page.php and page.php, page.php is correctly loaded into main_page.php but not cached, if I load page.php through browser it is cached.

Upvotes: 1

Views: 454

Answers (2)

Blake Visin
Blake Visin

Reputation: 148

I simulated this as basically as I could:

main_page.php: 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><head id="ctl00_Head1">

<script src="jquery-1.5.min.js"></script>
<script type="text/javascript">
  var id = <?=$_GET['id']?>;
  $(function(){
    $('#div').load('page.php?id=' + id);
  });
</script>

</head>

<body>

<div id="div">a</div>

</body>
</html>

page.php

<?php
$id = $_GET['id'];
$cache = 'the_location/'.$id.'.html';
 $expire = time() -3600 ; 
 if(file_exists($cache) && filemtime($cache) > $expire)
 {
  readfile($cache);
 } else {

 ob_start();
 echo 'This is a generated page';
  $pages = ob_get_contents();         
   ob_end_clean();

         $fd = fopen("$cache", "w");
   if ($fd) {
         fwrite($fd,$pages);
      fclose($fd);
    }            
  echo $pages; 
  }

This works for me. Things I noted while working through the code.

  1. make sure you are setting id to php's $_GET['id'] in javascript in the main_page.php
  2. make sure you are setting $id = $_GET['id']; on page.php
  3. using ob_end_flush(); along with echo $pages is repetitive (content gets flushed, then shows up twice when the page is regenerated), use ob_end_clean() or $pages = ob_get_flush().

Upvotes: 1

CarlosZ
CarlosZ

Reputation: 8679

Have you looked at the request that is being sent using firebug? JQuery is probably appending a cache-busting GET variable to the URL hence busting your cache :D

Upvotes: 0

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