Element 100-PHP output of three-dimensional arrays

<? PHP
     $ STU = Array ( Array (76,87,68),
                 Array (65,89,95),
                 Array (90,80,66),
                 Array (90,95,65));         // define a two dimensional array of 
    the foreach ( $ STU  AS  $ K => $ V ) {         // iterate 
        echo "elements { $ K } of elements: <br />" ;
         the foreach ( $ V  AS  $ K => $ V ) {
             echo "{ $ K } => { $ V} ";         // index of the output array / value pairs 
        }
         echo '<br />' ;
    }
?>