[thelist] Calculating Times in PHP

[Joe Crawford]

Poojie wrote:
> I'm attempting to time functions in PHP, but I keep getting
> negative values. I use the following function to get the time
> before and after the function I want to time has been called:
> 
> function time_now(){
>     list($usec, $sec) = explode(" ",microtime());
>     return ((float)$usec + (float)$sec);
> }
> 
> The timing code looks something like this:
> 
> $t_start = time_now();     // Start Time
> func_to_time();                // Some action
> $t_end = time_now();      // End Time
> 
> $t_total = $t_end  - $t_start; // Total time passed
> 
> How is it possible that roughly 1/2 of the result times turn up
> negative?


No idea - have you tried the code from here verbatim?
http://www.php.net/manual/en/function.microtime.php -- it looks similar
but not the same to yours. Does it also generate negative values?

	- Joe
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