array_rand
(PHP 4, PHP 5)
array_rand — Pick one or more random entries out of an array
Description
Picks one or more random entries out of an array, and returns the key (or keys) of the random entries.
Parameters
-
input -
The input array.
-
num_req -
Specifies how many entries you want to pick. Trying to pick more elements than there are in the array will result in an
E_WARNINGlevel error.
Return Values
If you are picking only one entry, array_rand() returns the key for a random entry. Otherwise, it returns an array of keys for the random entries. This is done so that you can pick random keys as well as values out of the array.
Changelog
| Version | Description |
|---|---|
| 5.2.10 | The resulting array of keys is no longer shuffled. |
| 4.2.0 | The random number generator is seeded automatically. |
Examples
Example #1 array_rand() example
<?php
$input = array("Neo", "Morpheus", "Trinity", "Cypher", "Tank");
$rand_keys = array_rand($input, 2);
echo $input[$rand_keys[0]] . "\n";
echo $input[$rand_keys[1]] . "\n";
?>
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