[PHP] array_unique in a multi-dimensional array

array_multi_unique.php

<?php

function array_multi_unique($array) {

    $tmp_ComparisonArray = $final_Array = Array();

    foreach($array as $key => $value) {
        if(!in_array($value[0], $tmp_ComparisonArray)) {
        
            $tmp_ComparisonArray[] = $value[0];
            $final_Array[] = $value;
            
        }
    }
    
    return $final_Array;
}