sibtracker/system/classes/cache.class.php

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4.8 KiB
PHP
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2019-05-18 13:46:03 +08:00
<?php
if(!defined('DATALIFEENGINE')){die("Hacking attempt!");}
class cache{
var $dir = false;
var $allow_cache = false;
var $memcache = false;
private $mcache;
private $memcache_host = '127.0.0.1';
private $memcache_port = 11211;
var $timelife = 3600;
function __construct($dir) {
global $config;
$this->dir = $dir;
if( $config['allow_cache'] = "yes" ) $this->allow_cache = true;
if( $config['cache_type']) $this->memcache = true;
if( $this->memcache AND function_exists('memcache_connect') ) $this->mcache = memcache_connect($this->memcache_host, $this->memcache_port);
if( $this->memcache AND function_exists('memcache_set_compress_threshold') ){memcache_set_compress_threshold( $this->mcache, 20000, 0.2 );}
}
function off(){
$this->allow_cache = false;
}
function set($file, $data){
$fp = fopen( $this->dir.'/system/' . $file . '.php', 'wb+' );
if (!$data) $data = 'a:0:{}';
fwrite( $fp, serialize( $data ) );
fclose( $fp );
@chmod( $this->dir.'/system/' . $file . '.php', 0666 );
}
function get($file){
return unserialize( @file_get_contents( $this->dir.'/system/' . $file . '.php' ) );
}
function delete($cache_area = false){
$fdir = opendir($this->dir.'/system/');
while ($file = readdir($fdir)){
if ($file != '.' and $file != '..' and $file != '.htaccess' and $file != 'online.php'){
if ($cache_area){
if (strpos($file, $cache_area) !== false) @unlink($this->dir.'/system/'.$file);
}else{
@unlink($this->dir.'/system/'.$file);
}
}
}
}
function filename($name){
if(!$this->memcache) return $this->dir.'/'.$name.'.tmp';
else return md5($name);
}
function open($name, $cache_id = false, $member_prefix = false){
global $is_logged, $member_id;
if(!$this->allow_cache) return false;
if( $is_logged ) $group = $member_id['user_group']; else $group = "0";
if( !$cache_id ){ $filename = $this->filename($name);
} else {
$cache_id = md5( $cache_id );
if( $member_prefix ) $filename = $this->filename($name . "_" . $cache_id . "_" . $group); else $filename = $this->filename($name . "_" . $cache_id);
}
if($this->memcache){
return memcache_get($this->mcache, $filename);
} else {
if(file_exists($filename) && is_readable($filename) && filesize($filename) > 0 && (time() - $this->timelife < filemtime($filename))) {
return @file_get_contents( $filename );
} else {
return false;
}
}
}
function save($name, $data, $cache_id = false, $member_prefix = false){
global $is_logged, $member_id;
if(empty( $data ) OR !$this->allow_cache) return false;
if( $is_logged ) $group = $member_id['user_group']; else $group = "0";
if( !$cache_id ){ $filename = $this->filename($name);
} else {
$cache_id = md5( $cache_id );
if( $member_prefix ) $filename = $this->filename($name . "_" . $cache_id . "_" . $group); else $filename = $this->filename($name . "_" . $cache_id);
}
if($this->memcache){
memcache_set( $this->mcache, $filename, $data, MEMCACHE_COMPRESSED, $this->timelife );
} else {
@unlink( $filename );
file_put_contents ($filename, $data, LOCK_EX);
@chmod( $filename, 0666 );
}
}
function clear($cache_areas = false) {
if ( $this->memcache ) {
memcache_flush($this->mcache);
} else {
if ( $cache_areas ) {if(!is_array($cache_areas)) {$cache_areas = array($cache_areas);}}
$fdir = opendir( $this->dir );
while ( $file = readdir( $fdir ) ) {
if( $file != '.' and $file != '..' and $file != '.htaccess' and $file != 'system' ) {
if( $cache_areas ) { foreach($cache_areas as $cache_area) if( strpos( $file, $cache_area ) !== false ) @unlink( $this->dir . '/' . $file );
} else {@unlink( $this->dir . '/' . $file );}
}}}
}
function del($file){
if ($this->memcache){
memcache_delete($this->mcache, $this->filename($file));
}else{
@unlink($this->filename($file));
}
}
function size(){
if($this->memcache){
$stat = memcache_get_stats($this->mcache);
$size = $stat['bytes'];
}else{
$size = dirsize($this->dir);
}
return $size;
}
public function __destruct(){
if($this->memcache){
if(memcache_close($this->mcache)){
return TRUE;
}else{
return FALSE;
}
}else{
return FALSE;
}
}
}
?>