Your IP : 216.73.216.124
<?php
/**
* Cache framework
* Author: Daniel Frużyński
* Based on DB Cache by Dmitry Svarytsevych
* http://design.lviv.ua
*/
/* Original code Copyright Dmitry Svarytsevych
Modifications Copyright 2009 Daniel Frużyński (email : daniel [A-T] poradnik-webmastera.com)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
// Path to plugin
if ( !defined( 'DBCR_PATH' ) ) {
define( 'DBCR_PATH', dirname( __FILE__ ) );
}
// Cache directory
if ( !defined( 'DBCR_CACHE_DIR' ) ) {
define( 'DBCR_CACHE_DIR', DBCR_PATH.'/cache' );
}
class pcache {
// Cache lifetime - by default 86400 sec = 24 hours
var $lifetime = 86400;
// Base storage path for global data
var $base_storage_global = null;
// Base storage patch for local data
var $base_storage = null;
// Path to current storage dir
var $storage = null;
// All subdirs
var $folders = array( 'options', 'links', 'terms', 'users', 'posts', 'joins', '' );
// Constructor
function pcache() {
$this->set_storage();
}
// Set storage dir for next operation(s)
function set_storage( $db = 'local', $context = '' ) {
/*if ( is_multisite() ) { // WP 3.0+ multisite install
if ( $db == 'global' ) {
if ( is_null( $this->base_storage ) ) {
$this->base_storage_global = DBCR_CACHE_DIR . '/@global';
}
} else { // local
if ( is_null( $this->base_storage_local ) ) {
global $current_site;
$this->base_storage = DBCR_CACHE_DIR . '/' . $current_site->domain . $current_site->path;
}
$this->storage = $this->base_storage;
}
} elseif ( defined( 'DBCR_MULTISITE' ) && DBCR_MULTISITE ) { // HTTP_HOST-based multisite
if ( is_null( $this->base_storage ) ) {
$host = strtolower( $_SERVER['HTTP_HOST'] );
$this->base_storage = DBCR_CACHE_DIR . '/' . $host;
}
$this->storage = $this->base_storage;
} else { // Single WP install
$this->storage = DBCR_CACHE_DIR;
}*/
$this->base_storage = DBCR_CACHE_DIR;
$this->storage = DBCR_CACHE_DIR;
// Set per-context path
if ( $context != '' ) {
$this->storage .= '/' . $context;
}
}
// Load data from cache for given tag
function load( $tag ) {
if ( $tag == '' ) {
return false;
}
$file = $this->storage.'/'.$tag;
$result = false;
// If file exists
if ( $filemtime = @filemtime( $file ) ) {
$f = @fopen( $file, 'r' );
if ( $f ) {
@flock( $f, LOCK_SH );
// for PHP5
if ( function_exists( 'stream_get_contents' ) ) {
$result = unserialize( stream_get_contents( $f ) );
} else { // for PHP4
$result = '';
while ( !feof( $f ) ) {
$result .= fgets( $f, 4096 );
}
$result = unserialize( $result );
}
@flock( $f, LOCK_UN );
@fclose( $f );
// Remove if expired
if ( ( $filemtime + $this->lifetime - time() ) < 0 ) {
$this->remove( $tag );
}
}
}
return $result;
}
// Save data to cache for given tag
function save( $value, $tag ) {
if ( $tag == '' || $value == '' ) {
return false;
}
$file = $this->storage.'/'.$tag;
$f = @fopen( $file, 'w' );
if ( !$f ) {
return false;
}
@flock( $f, LOCK_EX );
@fwrite( $f, serialize( $value ) );
@flock( $f, LOCK_UN );
@fclose( $f );
@chmod( $file, 0755 );
return true;
}
// Remove data from cache for given tag
function remove( $tag = '', $dir = false, $remove_expired_only = false ) {
if ( $tag == '' ) {
return false;
}
if ( $dir === false ) {
$dir = $this->storage;
}
$file = $dir.'/'.$tag;
if ( is_file( $file ) ) {
if ( $remove_expired_only && ( @filemtime( $file ) + $this->lifetime - time() ) > 0 ) {
return true;
}
if ( @unlink( $file ) ) {
return true;
}
}
return false;
}
function clean( $remove_expired_only = true, $db = 'local' ) {
$this->set_storage( $db );
foreach( $this->folders as $folder ) {
$path = $this->base_storage . '/';
if ( $folder != '' ) {
$path .= $folder . '/';
}
if ( $dir = @opendir( $path ) ) {
while ( $tag = readdir( $dir ) ) {
if ( ( $tag != '.' ) && ( $tag != '..' ) && ( $tag != '.htaccess' ) ) {
$this->remove( $tag, $path, $remove_expired_only );
}
}
closedir( $dir );
}
}
}
// Setup cache dirs
// Return true on success, false otherwise
function install( $global = false ) {
$this->set_storage( 'local' );
foreach( $this->folders as $folder ) {
$path = $this->base_storage . '/';
if ( $folder != '' ) {
$path .= $folder . '/';
}
if ( $folder != '' ) { // Skip base folder - it is already created
if ( !@mkdir( $path, 0755, true ) ) {
return false;
}
}
if ( !@copy( DBCR_PATH.'/htaccess', $path.'/.htaccess' ) ) {
return false;
}
}
/*if ( is_multisite() ) {
$this->set_storage( 'global' );
foreach( $this->folders as $folder ) {
$path = $this->base_storage . '/';
if ( $folder != '' ) {
$path .= $folder . '/';
}
if ( !@mkdir( $path, 0755, true ) ) {
return false;
}
if ( !@copy( DBCR_PATH.'/htaccess', $path.'/.htaccess' ) ) {
return false;
}
}
}*/
return true;
}
// Remove cache dirs
// Return true on success, false otherwise
function uninstall( $global = false ) {
$this->set_storage( 'local' );
$this->clean( false );
foreach( $this->folders as $folder ) {
$path = $this->base_storage . '/';
if ( $folder != '' ) {
$path .= $folder . '/';
}
@unlink( $path.'.htaccess' );
@rmdir( $path );
}
}
}
?>