function scriptIsRunning($key_word) {
    $key_word || $key_word = __CLASS__;
    $shell = "ps -ef | grep -v 'grep' |grep -v 'sudo' | grep '{$key_word}'";
    $cmd_run = @popen($shell, 'r');
    $total = 0;
    while(!feof($cmd_run)) {
        $content = trim(fgets($cmd_run, 1024));
        if(empty($content)){
            continue;
        }
        if (strpos($content, $key_word) !== false){
            $total++;
        }
    }
    @pclose($cmd_run);
    return $total;
}