ExtensionRegistry: Properly detect if a global is already set

[lhc/web/wiklou.git] / includes / registration / ExtensionRegistry.php

diff --git a/includes/registration/ExtensionRegistry.php b/includes/registration/ExtensionRegistry.php
index 6308461..ae1ab58 100644 (file)
--- a/includes/registration/ExtensionRegistry.php
+++ b/includes/registration/ExtensionRegistry.php
@@ -291,7 +291,7 @@ class ExtensionRegistry {
 
                        // Optimistic: If the global is not set, or is an empty array, replace it entirely.
                        // Will be O(1) performance.
-                       if ( !isset( $GLOBALS[$key] ) || ( is_array( $GLOBALS[$key] ) && !$GLOBALS[$key] ) ) {
+                       if ( !array_key_exists( $key, $GLOBALS ) || ( is_array( $GLOBALS[$key] ) && !$GLOBALS[$key] ) ) {
                                $GLOBALS[$key] = $val;
                                continue;
                        }