Hide "Add media", HTML editor from TinyMCE

Question

I have a custom post type which supports editor. (WordPress version 3.5)

I want to customize the editor for it.

1. Make it readonly
2. Hide "Add Media" button
3. Hide HTML editor
4. Remove status bar showing word count

I am using the following code:

add_filter( 'tiny_mce_before_init', function( $args ) {
     $args['readonly'] = 1;
     $args['media_buttons'] = 0;
     $args['theme_advanced_disable'] = "code";
     return $args;
});

Only readonly is working. Is it not possible to do other customization using tiny_mce_before_init?

Answer 1

It should be 'media_buttons' => FALSE.

array (
    'textarea_rows' => 5,
    'media_buttons' => FALSE,
    'teeny'         => TRUE,
    'tinymce'       => TRUE
)

… creates this editor:

Answer 2

If you want to hide/disable/prevent/remove the "Add Media"-button in 2018 you can do the following (in essence):

// probably in your functions.php
remove_action('media_buttons', 'media_buttons');

Answer 3

In WordPress ver 4.9 it does not seem media buttons can be turned off using the 'tiny_mce_before_init' hook.

Instead I was able to remove this using 'wp_editor_settings', like so:

add_filter( 'wp_editor_settings', function($settings) {
  $settings['media_buttons']=FALSE;
  return $settings;
});