Assign value or array in PHP variable to Javascript variable.

<?php
$name = 'Einstein';
$categories = array('1'=>'Red', '2'=>'Green', '3'=>'Blue');
?>

<script type="text/javascript">
// Assign a PHP value/string to JS variable.
var name = '<?php echo $name; ?>';
console.log(name);                       // Einstein

// Assign a PHP array to JS variable.
var categories = JSON.parse('<?php echo json_encode($categories); ?>');
console.log(categories[3]);           // Blue
</script>