Definition
The array_unique() function removes duplicate values from an array. If two or more array values are the same, the first appearance will be kept and the other will be removed. The returned array will keep the first array item's key type.
Syntax
array_unique(array, sorttype)
Parameters
| Parameter | Description |
|---|---|
array |
Required. Specifying an array. |
sorttype |
Optional. Specifies how to compare the array elements/items. Possible values: SORT_STRING - Default. Compare items as strings; SORT_REGULAR - Compare items normally (don't change types); SORT_NUMERIC - Compare items numerically; SORT_LOCALE_STRING - Compare items as strings, based on current locale. |
Example
<?php
$ages = array("Mark" => 22, "Jeff"=>22, "Mike" => 28);
print_r(array_unique($ages));