PHP mt_srand() - Math Functions
What is mt_srand Function?
Explanation
The mt_srand() function seeds the random number generator for mt_rand().This function should be called only once, and should be called before mt_rand() function.
Syntax:
mt_srand(seed)
In the above syntax "seed" specifies a seed number to the function to generate a random number.
Example :
<?php
mt_srand(mktime());
echo(mt_rand());
?>
Result :
1231655472
In the above example the seed is given as a function mktime(), the random values are returned based on that.