(PHP 4, PHP 5, PHP 7)

array_randPick one or more random keys out of an array


array_rand ( array $array [, int $num = 1 ] ) : mixed

Picks one or more random entries out of an array, and returns the key (or keys) of the random entries. It uses a pseudo random number generator that is not suitable for cryptographic purposes.



The input array.


Specifies how many entries should be picked.

Valorile întoarse

When picking only one entry, array_rand() returns the key for a random entry. Otherwise, an array of keys for the random entries is returned. This is done so that random keys can be picked from the array as well as random values. Trying to pick more elements than there are in the array will result in an E_WARNING level error, and NULL will be returned.

Istoricul schimbărilor

Versiune Descriere
7.1.0 The internal randomization algorithm has been changed to use the » Mersenne Twister Random Number Generator instead of the libc rand function.
5.2.10 The resulting array of keys is no longer shuffled.


Example #1 array_rand() example

= array("Neo""Morpheus""Trinity""Cypher""Tank");
$rand_keys array_rand($input2);
$input[$rand_keys[0]] . "\n";
$input[$rand_keys[1]] . "\n";

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