Jolr's Blog

<?php

class iCache
{
        var $caches;
        var $cachetable   = 'site_cache';
        var $cachename    = 'cache';
        var $cachetime    = 'dateline';
        var $cachecontent = 'content';
        var $functionfile = 'function.cache.php';

        function iCache($caches,$cachetable='',$cachename='',$cachecontent='',$cachetime='') {
                global $db;
                if ($cachetable!="" && $cachetable!=null) {
                        $this->cachetable = $cachetable;
                }
                if ($cachename!="" && $cachename!=null) {
                        $this->cachename = $cachename;
                }
                if ($cachetime!="" && $cachetime!=null) {
                        $this->cachetime = $cachetime;
                }
                if ($cachecontent!="" && $cachecontent!=null) {
                        $this->cachecontent = $cachecontent;
                }
                $query = $db->query("SELECT {$this->cachename},{$this->cachecontent},{$this->cachetime} FROM {$this->cachetable} WHERE $this->cachename IN ({$caches})");
                while($rs = $db->fields($query)) {
                        $this->caches[$rs[$this->cachename]] = $rs;
                }
        }

        function setFunctionFile($functionfile) {
                $this->functionfile = $functionfile;
        }

        function cache($cachename,$cachetime) {
                global $timestamp;
                if ($this->caches[$cachename] 
                        && $this->caches[$cachename][$this->cachecontent]!="" 
                        && ($timestamp - $this->caches[$cachename][$this->cachetime])<$cachetime) {
                        return unserialize($this->caches[$cachename][$this->cachecontent]);
                } else {
                        return $this->reCache($cachename);
                }
        }

        function reCache($cachename) {
                global $db,$timestamp;
                require_once($this->functionfile);
                if (@function_exists($cachename)) {
                        if ($cachecontent = $cachename()) {
                                $db->query("REPLACE INTO {$this->cachetable} ({$this->cachename},{$this->cachecontent},{$this->cachetime}) VALUES ('$cachename','".addslashes(serialize($cachecontent))."','$timestamp')");
                                return $cachecontent;
                        } else {
                                return "{$cachename}() cat't cached content";
                        }
                } else {
                        return "Can't load cache function {$cachename}()";
                }
        }
}