Ticket #10303: admin-message-core-wporg.diff

wp-admin/post.php

@@ -63 +63 @@
                 $location = add_query_arg( 'message', 4, get_edit_post_link( $post_ID, 'url' ) );
         }
 
+        do_action_ref_array( 'pre_post_redirect', array( $post_ID, $location ) );
+
         wp_redirect( $location );
 }
 

wp-admin/edit-page-form.php

@@ -404 +404 @@
 <div id="notice" class="error"><p><?php echo $notice ?></p></div>
 <?php endif; ?>
 <?php if (isset($_GET['message'])) : ?>
-<div id="message" class="updated fade"><p><?php echo $messages[$_GET['message']]; ?></p></div>
+<div id="message" class="updated fade"><?php echo apply_filters( 'page_admin_message', '<p>' . $messages[$_GET['message']] . '</p>' ); ?></div>
 <?php endif; ?>
 
 <?php

wp-admin/edit-form-advanced.php

@@ -554 +554 @@
 <div id="notice" class="error"><p><?php echo $notice ?></p></div>
 <?php endif; ?>
 <?php if (isset($_GET['message'])) : ?>
-<div id="message" class="updated fade"><p><?php echo $messages[$_GET['message']]; ?></p></div>
+<div id="message" class="updated fade"><?php echo apply_filters( 'post_admin_message', '<p>' . $messages[$_GET['message']] . '</p>' ); ?></div>
 <?php endif; ?>
 <form name="post" action="post.php" method="post" id="post">
 <?php

wp-admin/page.php

@@ -57 +57 @@
         } else {
                 $location = add_query_arg( 'message', 1, get_edit_post_link( $page_ID, 'url' ) );
         }
+        
+        do_action_ref_array( 'pre_page_redirect', array( $page_ID, $location ) );
 
         wp_redirect($location);
 }