谁有页面缓冲类！

Question

<?phpclass Lcache {
    var $bufferFileName;
    var $en;
    var $content;
var $limitTime;    function Lcache($LimitTime="600") {
        $this->bufferFileName = basename($_SERVER['PHP_SELF'],".php").".buf";
$this->limitTime = $LimitTime;
} function Start() {
        if (!file_exists($this->bufferFileName) || (int)date(time()-@filemtime($this->bufferFileName))>$this->limitTime) {
            $this->en = true; // 尚未缓存或已超时
        ob_start();
        } else {
            $this->readBuf();
$this->out();
exit;
        }
    }    function readBuf() {
        $fp = fopen($this->bufferFileName,"r");
        $this->content = fread($fp,filesize($this->bufferFileName));
    }    function get() {
        $this->content = ob_get_contents();
        ob_clean();
    }    function bufferTo() {
        $fp = fopen($this->bufferFileName,"w");
        fputs($fp,$this->content);
        fclose($fp);
    }    function out() {
        if ($this->en) {
            $this->get();
            $this->bufferTo();
        }
        echo $this->content;
    }
}
?>