Click here to Skip to main content
15,867,453 members
Articles / Programming Languages / PHP
Tip/Trick

Caching Output in PHP

Rate me:
Please Sign up or sign in to vote.
4.44/5 (14 votes)
23 Dec 2009CPOL 36K   8   4
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)


Written By
Software Developer
Greece Greece
This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.

Comments and Discussions

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

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.