I have a php array that I also want my javascript code to use. I don't want to keep having to edit both the php and javascript code all the time to keep the array current.
Is there a way to translate that array to a file and have javascript and php convert that file to an array and read from the file? How do we convert a file lines into an array in javascript?
Use JSON:
<?php
$arr = array('foo', 'bar', 'baz');
?>
<script type="text/javascript">
var arr = <?php echo json_encode($arr); ?>;
</script>
Use JSON.
Some useful links: http://php.net/json, http://www.json.org/js.html, http://www.dyn-web.com/tutorials/php-js/json.php
JavaScript's array/object syntax is equal to the json syntax, so you can simply use json_encode in PHP and echo that, as PHP is run on the server and JavaScript in the browser:
var my_nice_js_var = <?php echo json_encode($phpArray) ?>
Update: to do this in a JS file, call your file the-file.php and then add this add the top:
<?php header('Content-Type: text/javascript') ?>
