function LaunchBackgroundProcess($command){ //Запускает команду в фоне
    // Run command Asynchroniously (in a separate thread)
    if(PHP_OS=='WINNT' || PHP_OS=='WIN32' || PHP_OS=='Windows'){
        $command = 'start /MIN "" '. $command;
    } else {
        $command = $command .' /dev/null &';
    }
    $handle = popen($command, 'r');
    if($handle!==false){
        pclose($handle);
        return true;
    } else {
        return false;
    }
}
LaunchBackgroundProcess('php "'.__DIR__.DIRECTORY_SEPARATOR.'script1.php'.'"');
LaunchBackgroundProcess('php "'.__DIR__.DIRECTORY_SEPARATOR.'script2.php'.'"');
LaunchBackgroundProcess('php "'.__DIR__.DIRECTORY_SEPARATOR.'script3.php'.'"');