Description
mixed
array_rand ( array input [, int num_req] )
array_rand() is rather useful when you want to
pick one or more random entries out of an array. It takes an
input array and an optional argument
num_req which specifies how many entries you
want to pick - if not specified, it defaults to 1.
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.
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.
Example 1. array_rand() example
<?php
srand((float) microtime() * 10000000);
$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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See also shuffle().
