\System\ThreadingThread

<?php

namespace System\Threading {

    # PHP Notice:  Use of undefined constant Thread - assumed 'Thread'
    
    class Thread {

        const micro2Milli = 1000000;
    
        /**
         * Suspends the current thread for the specified number of milliseconds.
         *
         * @param millisecondsTimeout: The number of milliseconds for which the thread is suspended. 
         * If the value of the millisecondsTimeout argument is zero, the thread relinquishes the 
         * remainder of its time slice to any thread of equal priority that is ready to run. 
         * If there are no other threads of equal priority that are ready to run, execution of the 
         * current thread is not suspended.
         * 
         */
        public static function Sleep($millisecondsTimeout) {
            $sec  = $millisecondsTimeout / 1000;
            $msec = -1;
    
            if ($sec < 1) {
                $sec  = 0;
                $msec = $millisecondsTimeout * self::micro2Milli;
            } else {
                $sec  = intval($sec);
                $msec = ($millisecondsTimeout - $sec * 1000) * self::micro2Milli;
            }
    
            time_nanosleep ($sec, $msec);
        }
    }
}

?>