在js中读取php变量？ [重复]

Question

This question already has an answer here:

• How do I pass variables and data from PHP to JavaScript? 19 answers

I have a config file in PHP.

return array(
'window_width'      => 1000,
'window_height'     => 800
    //etc
);

How can I read these vars into my javascript? Should I echo them to the page, in perhaps a data attribute and pick them up from there? Or is there a better way?

</div>

Answer 1

<script>
   var settings = <?php echo json_encode($your_array); ?>;
   alert(settings.window_width);
</script>