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Closed 6 years ago.
can someone explain me what wp_localize_script() do?
I don't understand what it does in the first place even I have read it in the WP Codex.
It lets you use PHP data in the client by printing out a JavaScript object. From the Codex:
Localizes a script, but only if script has already been added. Can also be used to include arbitrary Javascript data in a page.
You use like so:
// Register script as per Codex instructions.
// It doesn't have to contain anything but the file must exist
wp_register_script('handle', get_template_directory_uri() .'/js/dummy.js');
// Send data to client
wp_localize_script('handle', 'Data', array(
'url' => home_url(),
));
This will print an object in JavaScript:
<script type='text/javascript'>
/* <![CDATA[ */
var Data = {"url":"http://..."};
/* ]]> */
</script>
Now in the client you can access that data:
console.log(Data.url);
It's very useful when you're building plugins so you can separate your client from your server logic instead of mixing JS and PHP all in the same file.
