CPU Auslastung unter Debian (nicht loadavg)!

function cpu() {
	function _time() {
		$shell = shell_exec('cat /proc/stat | grep "cpu"');  
		
		$parts = explode(" ", preg_replace("!cpu +!", "", $shell));  
		
		$return = array();
		$return['user'] = $parts;  
		$return['nice'] = $parts[1];  
		$return['system'] = $parts[2];  
		$return['idle'] = $parts[3];  
		return $return;
	}
	$time1 = _time();
	sleep(1);
	$time2 = _time();
	
	$delta = array();
 
	foreach ($time1 as $k=>$v) {
		$delta[$k] = $time2[$k] - $v;
	}
 
	$deltaTotal = array_sum($delta);
	$percentages = array();
 
	foreach ($delta as $k=>$v) {
		$percentages[$k] = round($v / $deltaTotal * 100, 2);
	}
	return $percentages;

}