rand
(PHP 4, PHP 5)
rand — Generate a random integer
Description
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.
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 |
|---|---|
| 4.2.0 | The random number generator is seeded automatically. |
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
- srand() - Seed the random number generator
- getrandmax() - Show largest possible random value
- mt_rand() - Generate a better random value