rand

(PHP 4, PHP 5, PHP 7)
Generate a random integer
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).

Caution

This function does not generate cryptographically secure values, and should not be used for cryptographic purposes. If you need a cryptographically secure value, consider using random_int(), random_bytes(), or openssl_random_pseudo_bytes() instead.

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())

Returns:

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

Examples:
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() -

getrandmax() -

mt_rand() -

random_int() -

random_bytes() -

openssl_random_pseudo_bytes() -

doc_php
2016-02-24 16:02:32
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