php man page for usleep

USLEEP(3)								 1								 USLEEP(3)

usleep - Delay execution in microseconds

SYNOPSIS
       void usleep (int  $micro_seconds)

DESCRIPTION
	Delays program execution for the given number of microseconds.

PARAMETERS
	      o $micro_seconds
		- Halt time in microseconds. A microsecond is one millionth of a second.

RETURN VALUES
	No value is returned.

EXAMPLES
       Example #1

	      usleep(3) example

	      <?php

	      // Current time
	      echo date('h:i:s') . "
";

	      // wait for 2 seconds
	      usleep(2000000);

	      // back!
	      echo date('h:i:s') . "
";

	      ?>

	      The above example will output:

	      11:13:28
	      11:13:30

SEE ALSO
       sleep(3), time_nanosleep(3), time_sleep_until(3), set_time_limit(3).

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