PHPがPDFページ数を読み取る方法

/**
    *   PDF   
    */
function getPageTotal($path){

        //     
        if (!$fp = @fopen($path,”r”)) {
            $error = “    {$path}  ”;
            return false;
        }
        else {
            $max=0;
            while(!feof($fp)) {
                $line = fgets($fp,255);
                if (preg_match(‘/\/Count [0-9]+/’, $line, $matches)){
                    preg_match(‘/[0-9]+/’,$matches[0], $matches2);
                    if ($max<$matches2[0]) $max=$matches2[0];
                }
            }
            fclose($fp);
            //     
            return $max;
        }

  }