rand
(PHP 3, PHP 4 )
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).
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
Note: 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.
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.
Note: 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().
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