What Version :-)

Check the manual, it has an interesting note:

Note: Since PHP 4.2.0 it's no longer necessary to seed the random number 
generator before using it. 


> Let's say you have a simple PHP file that just displays a random number.
> When the user hits the submit button, the page will reload and display
> another random number.
> How often do you need to call mt_srand(); ?  Just once?  Or each time
> the page gets reloaded?

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