PHP array_unique() Function

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# PHP array_unique() Function

Complete PHP Array Reference

## Definition and Usage

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.

## Syntax

    array_unique(array)

Parameter | Description
--- | ---
array | Required. Specifying an array

## Tips and Notes

Note: The returned array will keep the first array item's key type.

## Example

    <?php
    $a=array("a"=>"Cat","b"=>"Dog","c"=>"Cat");
    print_r(array_unique($a));
    ?>

The output of the code above will be:

    Array ( [a] => Cat [b] => Dog )

Complete PHP Array Reference

From http://www.w3schools.com (Copyright Refsnes Data)