rand

(PHP 4, PHP 5)

rand — Generate 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 32768. If you require a range larger than 32768, specifying min and max will allow you to create a range larger than this, or consider using mt_rand() instead.

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.

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
Since 3.0.7 In versions before 3.0.7 the meaning of max was range . To get the same results in these versions the short example should be rand (5, 11) to get a random number between 5 and 15.

Examples

Example #1 rand() example

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

echo rand(5, 15);
?>

The above example will output something similar to:

7771
22264
11

See Also

     

 

 
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