Convert PHP variable to javascript variable

<?php
    //Simple variable
    $php_test = "test value";

    //Array variable
    $php_var[0][0] = "value1";
    $php_var[0][1] = "value2";

    $php_var[1][0] = "value3";
    $php_var[1][1] = "value4";
?>

<script>
    var    js_test = '<?php echo $php_test; ?>';
    var js_var = <?php echo json_encode($php_var); ?>;
</script>