array_rand
Description
The array_rand of Array for PHP pick one or more random keys out of an array.
Syntax
array_rand(array $array, int $num = 1): int|string|array
Parameters
array
The input array.
num
Specifies how many entries should be picked.
Return
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.
Examples
1 · array
<?
$array = array("Peter", "Andrew", "James", "John");
$return = array_rand($array);
echo $return;
?>1
2 · num
<?
$array = array("Peter", "Andrew", "James", "John");
$num = 2;
$return = array_rand($array, $num);
print_r($return);
?>Array
(
[0] => 1
[1] => 3
)
3 · return
<?
$array = array("Peter", "Andrew", "James", "John");
$num = 2;
$return = array_rand($array, $num);
for($i = 0; $i < $num; ++$i)
{
echo $array[$return[$i]] . "\n";
}
?>Peter James
Links
Array
- array
- array_change_key_case
- array_chunk
- array_column
- array_combine
- array_count_values
- array_diff
- array_diff_assoc
- array_diff_key
- array_diff_uassoc
- array_diff_ukey
- array_fill
- array_fill_keys
- array_filter
- array_flip
- array_intersect
- array_intersect_assoc
- array_intersect_key
- array_intersect_uassoc
- array_intersect_ukey
- array_key_exists
- array_key_first
- array_key_last
- array_keys
- array_map
- array_merge
- array_merge_recursive
- array_multisort
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- array_pop
- array_product
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- array_replace_recursive
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- array_splice
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- array_udiff_assoc
- array_udiff_uassoc
- array_uintersect
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- array_unique
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- array_values
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