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PHP srand() Function

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Example

Seed the random number generator:

<?php
srand(mktime());
echo(rand());
?>

Run example »

Definition and Usage

The srand() function seeds the random number generator (rand()).

Tip: From PHP 4.2.0, the random number generator is seeded automatically and there is no need to use this function.


Syntax

srand(seed);

Parameter Description
seed Optional. Specifies the seed value

Technical Details

Return Value: None
Return Type: -
PHP Version: 4+
PHP Changelog: PHP 4.2.0: Random number generator is now seeded automatically

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