php sleep

function sleep_test(){

    ignore_user_abort(true);
    set_time_limit(0);
    $log_file_path = BASE_DATA_PATH.‘/log/cron‘;
    $this->mkdirs($log_file_path);
    $i = 0;
    do{
        $now = @date(‘Y-m-d H:i:s‘,TIMESTAMP);
        $log_file = $log_file_path. ‘/‘.date(‘Ymd‘,TIMESTAMP).‘.log‘;
        $url = $_SERVER[‘REQUEST_URI‘] ? $_SERVER[‘REQUEST_URI‘] : $_SERVER[‘PHP_SELF‘];
        $content = "[{$now}] -- {$i} \r\n{$url} \r\n";
        file_put_contents($log_file,$content, FILE_APPEND);
        $i++;
        sleep(10000);
    }while($i<10);

}