Look at this cache class first
<?php
| The code is as follows |
Copy Code |
| Class cache{
/*
class Name:cache
Description:control to cache data, $cache _out_time are a array to save CAC He date is out.
version:1.0
Author: Old farmer Cjjer
last modify:2006-2-26
author url:http://www.111cn.net*/
Private $cache _dir;
Private $expiretime =180;//cache time is 60 seconds
function __construct ($cache _dirname) {
if (! @is_ Dir ($cache _dirname)) {
if (! @mkdir ($cache _dirname,0777)) {
$this->warn (' Cached files do not exist and cannot be created, need to be created manually. ');
return false;
}
}
$this->cache_dir = $cache _dirname;
}
Function __destruct () {
echo ' Cache class bye. ';
} function Get_url () {
if (!isset ($_server[' Request_uri ')) {
$url = $_server[' Request_uri '];
}else{
$url = $_server[' Script_name '];
$url. = (!empty ($_server[' query_string '))? '?' . $_server[' query_string ']: ';
} return $url;
} function warn ($errorstring) {
echo "<b><font color= ' red ' > Error:<pre>". $errorstring. " </pre></font></b> ";
} function Cache_page ($pageurl, $pagedata) {
if (! $fso =fopen ($pageurl, ' W ')) {
$this->warns (' Unable to open cache file. '); /trigger_error
return false;
}
if (!flock ($fso, lock_ex)) {//LOCK_NB, exclusive lock
$this->warns (' Unable to lock cache file. '); /trigger_error
return false;
}
if (!fwrite ($fso, $pagedata)) {//write byte stream, serialize write to other format
$this->warns (' Unable to write cache file. '); /trigger_error
return false;
}
Flock ($fso, Lock_un);/release lock
Fclose ($FSO);
return true;
} |
