php man page for sys_getloadavg

SYS_GETLOADAVG(3)							 1							 SYS_GETLOADAVG(3)

sys_getloadavg - Gets system load average

SYNOPSIS
       array sys_getloadavg (void  )

DESCRIPTION
	Returns  three	samples  representing  the average system load (the number of processes in the system run queue) over the last 1, 5 and 15
       minutes, respectively.

RETURN VALUES
	Returns an array with three samples (last 1, 5 and 15 minutes).

EXAMPLES
       Example #1

	      A sys_getloadavg(3) example

	      <?php
	      $load = sys_getloadavg();
	      if ($load[0] > 80) {
		  header('HTTP/1.1 503 Too busy, try again later');
		  die('Server too busy. Please try again later.');
	      }
	      ?>

NOTES
       Note

	      This function is not implemented on Windows platforms.

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