Description:
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The manual does not clearly state how the seconds are determined for set_time_limit and max_execution_time - it keeps saying "seconds" - but on many of my apps i do not use sleep() or anything that shouldn't count as part of the timeout, yet it seems to never timeout; even with set_time_limit(20) set. something that low should be okay, but it doesn't appear to be.

for instance in a script i have, i set_time_limit(20) - and the script normally takes at lest 2-5 minutes of actual time to run. it uses curl a lot and string work; no sleep() involved

when i exit the script i see this:

real    0m52.776s
user    0m0.084s
sys     0m0.078s

it far surpassed "real" time - but apparently did not use much user/sys time. is that the reason for it not terminating yet? does it need to use 20 seconds of "user" time? is there any way for a function to be defined or a parameter to be added to tell it to measure in actual script execution time (without any concern for sleep() or external system calls or anything - flat out limiting how long a script runs based on human seconds?)