Ticket #30430: wp-deep-copy.diff

src/wp-includes/cache.php

@@ -244 +244 @@
 }
 
 /**
+ * Performs a deep copy of an item to ensure that arrays of objects
+ * are properly duplicated
+ *
+ * @param mixed $data The data to be duplicated
+ * @return mixed copy of the data
+ */
+function wp_deep_copy( $data ) {
+        if ( is_object( $data ) ) {
+                return clone $data;
+        } elseif ( is_array( $data ) ) {
+                $new = array();
+                foreach ( $data as $key => $value ) {
+                        if ( is_object( $value ) ) {
+                                $new[ $key ] = clone $value;
+                        } elseif ( is_array( $value ) ) {
+                                $new[ $key ] = wp_deep_copy( $value );
+                        } else {
+                                $new[ $key ] = $value;
+                        }
+                }
+
+                return $new;
+        } else {
+                return $data;
+        }
+}
+
+/**
  * WordPress Object Cache
  *
  * The WordPress Object Cache is used to save on trips to the database. The
@@ -619 +647 @@
 
                 if ( is_object( $data ) )
                         $data = clone $data;
+                elseif ( is_array( $data ) )
+                        $data = wp_deep_copy( $data );
 
                 $this->cache[$group][$key] = $data;
                 return true;