Jak dodać tablicę PHP do tablicy JS w Highcharts

Chcę tylko móc dodać tę prostą tablicę PHP do wyświetlania na osi X. Nie chce w ogóle wyświetlać moich treści i nie rozumiem dlaczego.

<!DOCTYPE HTML>
<html>
    <head>
        <?php 
        $array = array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec");
        ?>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>Highcharts Example</title>
        <script src="//ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"type="text/javascript"></script> 
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
        <script type="text/javascript">


$(function () {
    js_array = new Array(<?php echo json_encode($array) ?>);
        $('#container').highcharts({
            title: {
                text: 'Monthly Average Temperature',
                x: -20 //center
            },
            subtitle: {
                text: 'Source: WorldClimate.com',
                x: -20
            },
            xAxis: {
                categories: js_array
            }

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