Ticket #32582: 32582.2.diff

src/wp-admin/includes/screen.php

@@ -78 +78 @@
         $hidden = get_hidden_meta_boxes($screen);
 
         foreach ( array_keys($wp_meta_boxes[$screen->id]) as $context ) {
-                foreach ( array_keys($wp_meta_boxes[$screen->id][$context]) as $priority ) {
+                $priorities = array_keys( $wp_meta_boxes[$screen->id][$context] );
+                usort( $priorities, '_usort_meta_box_prefs_by_priority' );
+
+                foreach ( $priorities as $priority ) {
                         foreach ( $wp_meta_boxes[$screen->id][$context][$priority] as $box ) {
                                 if ( false == $box || ! $box['title'] )
                                         continue;
@@ -95 +98 @@
 }
 
 /**
+ * Sort meta box priorities.
+ *
+ * Used by usort() as a callback, should not be used directly.
+ *
+ * @since 4.3.0
+ * @access private
+ *
+ * @param string $a
+ * @param string $b
+ *
+ * @return int
+ */
+function _usort_meta_box_prefs_by_priority( $a, $b ) {
+        $priorities = array(
+                'high'    => 10,
+                'core'    => 8,
+                'default' => 5,
+                'low'     => 1,
+        );
+
+        return $priorities[ $b ] - $priorities[ $a ];
+}
+
+/**
  * Get Hidden Meta Boxes
  *
  * @since 2.7.0