if ( $xls = SimpleXLS::parse('book.xls') ) {
	print_r( $xls->rows() );
} else {
	echo SimpleXLS::parseError();
}

Array
(
    [0] => Array
        (
            [0] => ISBN
            [1] => title
            [2] => author
            [3] => publisher
            [4] => ctry
        )

    [1] => Array
        (
            [0] => 618260307
            [1] => The Hobbit
            [2] => J. R. R. Tolkien
            [3] => Houghton Mifflin
            [4] => USA
        )

)

if ( $xlsx = SimpleXLSX::parse('book.xlsx') ) {
	print_r( $xlsx->rows() );
} else {
	echo SimpleXLSX::parseError();
}

Array
(
    [0] => Array
        (
            [0] => ISBN
            [1] => title
            [2] => author
            [3] => publisher
            [4] => ctry
        )

    [1] => Array
        (
            [0] => 618260307
            [1] => The Hobbit
            [2] => J. R. R. Tolkien
            [3] => Houghton Mifflin
            [4] => USA
        )

)