Funcții ale tablourilor (Array)
PHP Manual

array_rand

(PHP 4, PHP 5, PHP 7)

array_randPick one or more random entries out of an array

Descrierea

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

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.

Parametri

array

The input array.

num

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
5.2.10 The resulting array of keys is no longer shuffled.

Exemple

Example #1 array_rand() example

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

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Funcții ale tablourilor (Array)
PHP Manual