wp_editor() usage in custom meta box

This may not solve the problem, but I hope it helps you.

1. In the sky_post_excerpts() function, I used this to display the TinyMCE/classic editor: (the $data is get_post_meta($post->ID, 'skyscraper_post', true))

   <?php wp_editor( $data, 'post_meta_box', array('textarea_name'=>'skyscraper_post')); ?>
   

2. In the post_meta_box_save() function, I saved the meta like so, where $allowed is wp_kses_allowed_html():

   update_post_meta( $post_id, 'skyscraper_post', wp_kses( $_POST['skyscraper_post'], $allowed ) );
   

3. On the front-end, I display the metadata like so:

   // This is really just an example. And I was on a single post.
   echo get_post_meta( get_the_ID(), 'skyscraper_post', true );
   

And everything worked well for me — all HTML remained as generated by the TinyMCE editor.

UPDATE

if I use visual not text in TinyMCE then the p tags doesn’t show

wp_kses_allowed_html() when called without specifying the $context parameter, will use the global variable $allowedtags which is an array of KSES allowed HTML elements, which (by default) do not include p tags/elements.

If you want to allow p elements, you can:

• Use wp_kses_allowed_html( 'post' ) which will use the global variable $allowedposttags which also holds similar array as the $allowedtags variable, but $allowedposttags has many elements allowed including table and video.

• Or manually enable the p elements:

  $allowed = wp_kses_allowed_html();
  $allowed['p'] = array(); // allows all attributes!
  

• Same as above, but build your own allowed tags:

  $allowed = array();
  $allowed['p'] = array(); // allows all attributes!
  

But, you shouldn’t allow all attributes.. so:

$allowed['p'] = array(
  'class' => true,
  'id'    => true,
  ...other attributes...
);