PHP ini_set max_execution_time nog是否正常工作？

Question

To monitor the max_execution_time of a particular script, I use

ini_set('max_execution_time', 600); //600 seconds = 10 minutes

at the top of my script. However, when I build a logging of the same file it returns me the following:

25-09-2017 23:08:01|STARTED
25-09-2017 23:09:01|ALREADY RUNNING
25-09-2017 23:10:01|ALREADY RUNNING
...................|ALREADY RUNNING
26-09-2017 01:09:01|ALREADY RUNNING
26-09-2017 01:10:01|ALREADY RUNNING
26-09-2017 01:11:01|STARTED
26-09-2017 01:12:01|ALREADY RUNNING
26-09-2017 01:13:01|ALREADY RUNNING
...................|ALREADY RUNNING
26-09-2017 03:10:01|ALREADY RUNNING
26-09-2017 03:11:01|ALREADY RUNNING
26-09-2017 03:12:01|STARTED
26-09-2017 03:13:01|ALREADY RUNNING
26-09-2017 03:14:02|ALREADY RUNNING
...................|ALREADY RUNNING
26-09-2017 05:09:01|ALREADY RUNNING
26-09-2017 05:10:02|ALREADY RUNNING
26-09-2017 05:11:01|STARTED
26-09-2017 05:12:01|ALREADY RUNNING
26-09-2017 05:13:02|ALREADY RUNNING
26-09-2017 05:14:01|ALREADY RUNNING
...................|ALREADY RUNNING
26-09-2017 07:14:01|ALREADY RUNNING
26-09-2017 07:15:01|ALREADY RUNNING
26-09-2017 07:16:01|STARTED

The ...................|ALREADY RUNNING represents multiple messages repeating every minute in between.

What am I doing wrong, since the interval is not 10 minutes by far?

EDIT:

The while loop I have:

while (true) {
    //DO PROCESSING WHEN FILES ARE PRESENT
    Sleep(1);
    }

Answer 1

Just check execution time manually.

$max_exec_time = 600;

$start_time = time();
while (true) {
  do_something();
  sleep(1);
  if (time() - $start_time > $max_exec_time) {
    exit;
  }
}