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Posted 16 Dec 2009

Caching Output in PHP

, 23 Dec 2009
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Introduction...

Introduction



High-traffic sites can often benefit from caching of pages, to save processing of the same data over and over again.

Using the Code



Put the first function cache_start in the beginning of php script and the second cache_end in the end of script.

$_time : cache time
$dir : directory to cache files
 
function cache_start($_time, $dir)
{
  $cachefile = $dir.'/'.sha1($_SERVER['REQUEST_URI']).'.html';
  $cachetime = $_time;
  ob_start();
 
  if(file_exists($cachefile) && (time( )-$cachetime < filemtime($cachefile)))
  {
    include($cachefile);
    ob_end_flush();
    exit;
  }
}
 
function cache_end($dir)
{
  $cachefile = $dir.'/'.sha1($_SERVER['REQUEST_URI']).'.html';
  $fp = fopen($cachefile, 'w');
  fwrite($fp, ob_get_contents());
  fclose($fp);
  ob_end_flush();
}

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

koula7
Software Developer
Greece Greece
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Comments and Discussions

 
GeneralUm Pin
Rockyonfire16-Aug-10 11:24
memberRockyonfire16-Aug-10 11:24 
GeneralRe: Um Pin
S.M. Zamshed Farhan11-Jan-13 5:52
memberS.M. Zamshed Farhan11-Jan-13 5:52 
GeneralMy vote of 1 Pin
dung_90ghost5-Apr-10 0:47
memberdung_90ghost5-Apr-10 0:47 
GeneralGood Tip Pin
Jon Anthony17-Dec-09 2:38
memberJon Anthony17-Dec-09 2:38 

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