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PHP Manual :: mt_getrandmax



min || mt_rand || Math Functions || PHP Manual

(PHP 4, PHP 5, PHP 7)

mt_getrandmaxShow largest possible random value

Description

int mt_getrandmax ( void )

Returns the maximum value that can be returned by a call to mt_rand().

Return Values

Returns the maximum random value returned by a call to mt_rand() without arguments, which is the maximum value that can be used for its max parameter without the result being scaled up (and therefore less random).

Examples

Example #1 Calculate a random floating-point number

<?php
function randomFloat($min 0$max 1) {
    return 
$min mt_rand() / mt_getrandmax() * ($max $min);
}

var_dump(randomFloat());
var_dump(randomFloat(220));
?>

The above example will output something similar to:

float(0.91601131712832)
float(16.511210331931)

See Also



min || mt_rand || Math Functions || PHP Manual
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