<?php

class Locker
{
    public static function set()
    {
        if (!$f = fopen(__DIR__ . DIRECTORY_SEPARATOR . 'tmp.lock', 'c')) {
            echo 'праблэм';
            exit;
        }

        if(!flock($f, LOCK_EX | LOCK_NB)) {
            echo 'STOP';
            exit;
        }
    }
}