Ticket #32499: 32499.4.diff

src/wp-admin/includes/screen.php

@@ -51 +51 @@
  * @return array
  */
 function get_hidden_columns( $screen ) {
-        if ( is_string( $screen ) )
+        if ( is_string( $screen ) ) {
                 $screen = convert_to_screen( $screen );
+        }
 
-        return (array) get_user_option( 'manage' . $screen->id . 'columnshidden' );
+        $hidden = get_user_option( 'manage' . $screen->id . 'columnshidden' );
+
+        if ( ! $hidden ) {
+                $hidden = array();
+
+                /**
+                 * Filter the default list of hidden columns.
+                 *
+                 * @since 4.4.0
+                 *
+                 * @param array     $hidden An array of columns hidden by default.
+                 * @param WP_Screen $screen WP_Screen object of the current screen.
+                 */
+                $hidden = apply_filters( 'default_hidden_columns', $hidden, $screen );
+        }
+
+        /**
+         * Filter the list of hidden columns.
+         *
+         * @since 4.4.0
+         *
+         * @param array     $hidden An array of hidden columns.
+         * @param WP_Screen $screen WP_Screen object of the current screen.
+         */
+        return apply_filters( 'hidden_columns', $hidden, $screen );
 }
 
 /**