<?php
$fileName	= __DIR__ . '/cron.txt';
$pidFile	= __DIR__ . '/cronPid.txt';
$pidFilePointer = fopen($pidFile, "w+");
if (flock($pidFilePointer, LOCK_EX | LOCK_NB)) {
	if (file_exists($fileName) && filesize($fileName)>0) {
		unlink($fileName);
	}

	while (true) {
		if(!file_exists($pidFile))
			exit;
	
		if (file_exists($fileName) && filesize($fileName)>0) {
			$cronFile = fopen($fileName, "r+");
			while (($buffer = fgets($cronFile, 4096)) !== false) {
				shell_exec($buffer);
			}
			
			ftruncate($cronFile, 0);
			fclose($cronFile);
		}
		sleep(2);
		clearstatcache();
	}
}