rand

(PHP 3, PHP 4 , PHP 5)

rand -- Generate a random integer

Description

int rand ( [int min, int max] )

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

Príklad 1. rand() example

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

echo
rand(5, 15);
?>

V�stup pr�kladu uveden�ho vy�ie bude nie�o podobn� tomuto:

7771
22264
11

Poznámka: On some platforms (such as Windows) RAND_MAX is only 32768. If you require a range larger than 32768, specifying min and max will allow you to create a range larger than RAND_MAX, or consider using mt_rand() instead.

Poznámka: Po��naj�c PHP 4.2.0 nie je potrebn� �tartova� gener�tor n�hodn�ch ��sel s srand() alebo mt_srand(), nako�ko sa tak u�in� automaticky.

Poznámka: 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.

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