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mt_srand

Manual PHP
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mt_srand

(PHP 3>= 3.0.6, PHP 4 , PHP 5)

mt_srand -- Seed the better random number generator

Description

void mt_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.

Exemplu 1. mt_srand() example


<?php
// seed with microseconds
function make_seed()
{
    list($usec, $sec) = explode(' ', microtime());
    return (float) $sec + ((float) $usec * 100000);
}
mt_srand(make_seed());
$randval = mt_rand();
?>

Notã: 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.

See also: mt_rand(), mt_getrandmax(), and srand().

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mt_srand

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