Disable Gutenberg editor

Author: timiwahalahti

classes/class-cpt-wplf-form.php

@@ -38,6 +38,7 @@ public function __construct() {
 
     add_filter( 'default_content', array( $this, 'default_content_cpt' ) );
     add_filter( 'user_can_richedit', array( $this, 'disable_tinymce' ) );
+    add_filter( 'use_block_editor_for_post_type', array( $this, 'disable_gutenberg'), 10, 2 );
 
     // front end
     add_shortcode( 'libre-form', array( $this, 'shortcode' ) );
@@ -135,6 +136,17 @@ public function disable_tinymce( $default ) {
     return $default;
   }
 
+  /**
+   *  Disable Gutenberg editor
+   */
+  public function disable_gutenberg( $is_enabled, $post_type ) {
+    if( $post_type === 'wplf-form') {
+      return false;
+    }
+
+    return $is_enabled;
+  }
+
   /**
    * Berore permanently deleting form entry, remove attachments
    * in the case they were not added to media library