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PHP

Generate a random integer


rand

(PHP 4, PHP 5)

randGenerate a random integer

Description

int rand ( void )
int rand ( int $min , int $max )

If called without the optional min, max arguments rand() returns a pseudo-random integer between 0 and getrandmax(). If you want a random number between 5 and 15 (inclusive), for example, use rand(5, 15).

Note: On some platforms (such as Windows), getrandmax() is only 32767. If you require a range larger than 32767, specifying min and max will allow you to create a range larger than this, or consider using mt_rand() instead.

Parameters

min

The lowest value to return (default: 0)

max

The highest value to return (default: getrandmax())

Return Values

A pseudo random value between min (or 0) and max (or getrandmax(), inclusive).

Changelog

Version Description
4.2.0The random number generator is seeded automatically.

Examples

Example #1 rand() example

<?php
echo rand() . "\n";
echo 
rand() . "\n";

echo 
rand(515);
?>

The above example will output something similar to:

 7771 22264 11 

See Also



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