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PHP Functions
Function: srand (PHP 3, PHP 4, PHP 5) srand -- Seed the random number generatorDescriptionvoid srand ( [int seed] )Seeds the random number generator with seed . Since PHP 4.2.0, the seed becomes optional and defaults to a random value if omitted.
Example 1. srand() example <?php // seed with microseconds function make_seed() { list($usec, $sec) = explode(' ', microtime()); return (float) $sec + ((float) $usec * 100000); } srand(make_seed()); $randval = rand(); ?> Note: As of PHP 4.2.0, there is no need to seed the random number generator with srand() or mt_srand() as this is now done automatically. Related Function(s) |