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PHP mt_rand() Function

Complete PHP Math Reference

Definition and Usage

The mt_rand() function returns a random integer using the Mersenne Twister algorithm.

If this function is called without parameters, it returns a pseudo-random value between 0 and RAND_MAX.

If you want a random number between 10 and 100 (inclusive), use mt_rand (10,100).

Syntax

mt_rand(min,max)

Parameter	Description
min,max	Optional. Specifies the range the random number should lie within

Tips and Notes

Tip: This function produces a better random value four times faster than rand()!

Note: In PHP 4.2.0 and later, there is no need to seed the random generator with mt_srand(). This is done automatically.

Example

In this example we will return some random numbers:

<?php
echo(mt_rand() . "<br />");
echo(mt_rand() . "<br />");
echo(mt_rand(10,100))
?>

The output of the code above could be:

1150905288
613289478
21