class Matrix {
    function rotateClockwise90( $matrix ) {
        $newMatrix = array();
 
        foreach( $matrix as $line ) {
            foreach( $line as $k => $v ) {
                if( !isset( $newMatrix[ $k ] ) ) {
                    $newMatrix[ $k ] = array();
                }
                array_unshift( $newMatrix[ $k ], $v );
            }
 
        }
        return $newMatrix;
    }
 
    function rotateClockwise180( $matrix ) {
        return $this->rotateClockwise90( $this->rotateClockwise90( $matrix ) );
    }
 
    function rotateClockwise270( $matrix ) {
        return $this->rotateClockwise180( $this->rotateClockwise90( $matrix ) );
    }
}

function displayMatrix( $matrix ) {
    foreach( $matrix as $line ) {
        echo implode( ',', $line ) . PHP_EOL;
    }
}
 
$matrice = array(
    array( 'A','B','C' ),
    array( 'D','E','F' ),
    array( 'G','H','I' ),
    array( 'J','K','L' )
);
 
displayMatrix( $matrice );
echo PHP_EOL;
 
$matrix = new Matrix();
$matrice = $matrix->rotateClockwise90( $matrice );
 
displayMatrix( $matrice );