Question

I’m looking for a WP function that add the Read-only parameter to all Pages’s Titles’s input, that will make the Page’s title unalterable.

Thanks a lot in advance.

Answer 1

This can be accomplished with some simple JavaScript/jQuery. Create a file called admin_title_disable.js, and queue it up within functions.php. For example:

functions.php:

wp_register_script('admin_title_disable', '/path/to/admin_title_disable.js');
function disableAdminTitle () {
  wp_enqueue_script('admin_title_disable');
}
add_action('admin_enqueue_scripts', 'disableAdminTitle');

Now, in your js file:

jQuery(document).ready(function ($) {
  $('#title').attr('disabled','disabled');
});

This will set both post and page title input fields with a disabled attribute. Hope this helps!

If you want to restrict this script to a particular admin page, wrap the add_action hook in a conditional that compares $_GET['page']. You can also take advantage of the $hook parameter that is available when using admin_enqueue_scripts to check for the page. See here.

Update::

WordPress makes it a little tricky to tell between post and page edit screens, but there is a hidden input that you can take advantage of. 🙂 Here’s an updated version of the jQuery that will only run on page edit screens:

jQuery(document).ready(function ($) {
  //find the hidden post type input, and grab the value
  if($('#post_type').val() === 'page'){
    $('#title').attr('disabled','disabled');
  }
 });