How PHP Gets the current CPU usage of CentOS

Title.

I use
$str = shell_exec (' More/proc/stat ');
Or
Popen (' Top-b-N 2 | grep-e "(CPU)" ', "R");
Take the image is not accurate, each time is 0.4%, but on the server with top view change is 0.7,1.0,14 ...

How to get it fast?

Reply to discussion (solution)

Top look at that doesn't say CPU utilization

No

Top look at that doesn't say CPU utilization

No


Top look at that doesn't say CPU utilization

Oh, can PHP get the CPU instant usage percentage? Or the same as top, just want to get a data.

commands for viewing CPU usage under Linux

No


Top look at that doesn't say CPU utilization

Oh, can PHP get the CPU instant usage percentage? Or the same as top, just want to get a data.

Your system has installed Sysstat, you can use Mpstat, SAR, etc.
Http://www.cyberciti.biz/tips/how-do-i-find-out-linux-cpu-utilization.html

