function Arr_Dupl_Del($Arr, $CaseSensitive = true) {
    /*
    Purpose
        Used to remove duplicate elements from an array without changing the order of the elements.
    Parameters
        Arr (array) = The array we're working with.
        CaseSensitive (optional boolean) = Determines if elements with differing case are considered duplicates.
            If True, similar elements with different cases are considered different.
            If False, similar elements with different cases are considered the same and are deleted.
            Default: True
    Return (array)
        Returns the specified array (Arr) with all duplicates removed.
        When duplicate elements exist, the first duplicate remains and all later-occurring ones are removed.
    Version History
        1.0 2012.11.15 Tested by Russ Tanner on PHP 5.3.8.
    */

    $r = array();
    
    if ($CaseSensitive) foreach($Arr as $x) { if (! in_array($x, $r)) $r[] = $x; }
    else { foreach($Arr as $x) { if (array_search(strtolower($x), array_map('strtolower', $r)) === false) { $r[] = $x; } } }
    
    return $r;

}