Ticket #45456: 45456.diff

src/wp-admin/includes/post.php

@@ -2218 +2218 @@
          * Some meta boxes hook into these actions to add hidden input fields in the classic post form. For backwards
          * compatibility, we can capture the output from these actions, and extract the hidden input fields.
          */
-        $actions = array(
-                'edit_form_after_title',
-                'edit_form_advanced',
-        );
-
-        foreach ( $actions as $action ) {
-                ob_start();
-                do_action_deprecated(
-                        $action,
-                        array( $post ),
-                        '5.0.0',
-                        'block_editor_meta_box_hidden_fields',
-                        __( 'This action is still supported in the classic editor, but is deprecated in the block editor.' )
-                );
-                $classic_output = ob_get_clean();
-
-                if ( ! $classic_output ) {
+        ob_start();
+        /** This filter is documented in wp-admin/edit-form-advanced.php */
+        do_action( 'edit_form_after_title', $post );
+        /** This filter is documented in wp-admin/edit-form-advanced.php */
+        do_action( 'edit_form_advanced', $post );
+        $classic_output = ob_get_clean();
+
+        $classic_elements = wp_html_split( $classic_output );
+        $hidden_inputs    = '';
+        foreach( $classic_elements as $element ) {
+                if ( 0 !== strpos( $element, '<input ') ) {
                         continue;
                 }
 
-                $classic_elements = wp_html_split( $classic_output );
-                $hidden_inputs    = '';
-                foreach( $classic_elements as $element ) {
-                        if ( 0 !== strpos( $element, '<input ') ) {
-                                continue;
-                        }
-
-                        if ( preg_match( '/\stype=[\'"]hidden[\'"]\s/', $element ) ) {
-                                echo $element;
-                        }
+                if ( preg_match( '/\stype=[\'"]hidden[\'"]\s/', $element ) ) {
+                        echo $element;
                 }
         }
         ?>