If I have a long running script and i want a exact time limit, I set this as near as possible to the first line. If you are streaming large data from database, it is counted towards the max exec time. I had a few quick php scripts I wrote for use with cacti for example. IIS 5 has a default timeout of seconds. If you need a higher timeout, you also have to change IIS properties. Otherwise, your server will stop your PHP script before it reaches its own timeout.
Unfortunately, a script which gets into an infinite loop can produce an alarming amount of output in only a few seconds. Unfortunately, even two seconds of run time produced enough output to overload the memory available to my browser.
Eric Leschinski k 86 86 gold badges silver badges bronze badges. You can fiddle around with swaths of microtime statements if you need this in production, but if it's just for testing, just use xdebug's profiler for instance. No messy code is a real plus.
Add a comment. Active Oldest Votes. Improve this answer. Tim Cooper Tim Cooper k 36 36 gold badges silver badges bronze badges. You need microtime true if you want to do calculations with the return value. I know this is waaaaaay too late almost 4 years , but as a comment While this is a very old post, we should refer to the fact that the float returned does contain the microseconds Best solution is to times this by Show 3 more comments.
This way you don't need to save a timestamp at the beginning of your script. Iwazaru Iwazaru 6, 4 4 gold badges 32 32 silver badges 49 49 bronze badges. WimDeblauwe To clarify, yes the result is in seconds.
But with microsecond precision. This is the best way to measure out the response time — Mike Aron. You guys are confusing microseconds with miliseconds. Show 1 more comment. Is there a way to get access to this inside of the script? I'd like to include some logging with my tests about how much CPU was burnt in the actual PHP the time is not incremented when the script is sitting and waiting for the database.
If all you need is the wall-clock time, rather than the CPU execution time, then it is simple to calculate:. Note that you don't need to calculate a difference if you are spawning a php instance for every test. Since PHP 7, it also works on Windows. The cheapest and dirtiest way to do it is simply make microtime calls at places in your code you want to benchmark. Do it right before and right after database queries and it's simple to remove those durations from the rest of your script execution time.
A hint: your PHP execution time is rarely going to be the thing that makes your script timeout. If a script times out it's almost always going to be a call to an external resource.
I think you should look at xdebug. The profiling options will give you a head start toward knowing many process related items. Every call to startTime function will initiate a separate time tracker. So you can initiate as many as you want and can stop them wherever you want them.
Further expanding on Hamid's answer, I wrote a helper class that can be started and stopped repeatedly for profiling inside a loop. You may only want to know the execution time of parts of your script. This code works, just copy and paste and run:. Small script that print, centered in bottom of the page, the script execution that started at server call with microsecond precision.
Another approach is to make the snippet as small as possible, and style it with a class in your stylesheet. As an alternative you can just put this line in your code blocks and check php logs, for really slow functions it's pretty useful:.
As you suspect we need some global variables to be accessed by a class object or a static method: I choose the 2nd approach and here it is:.
Now all you have is to call the method that belongs to the specific category with the index that denotes it's unique group:. I tested with php unit and between different test methods at the same test file it behaves fine so far!
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. This will lead to gateway errors on the webserver. Another important thing is session handling. This means subsequent requests will block until the session is closed. This also applies for all other locking techniques as flock or database locks for example.
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