From 6b4be82dbcef7982e2de82f7f0c3d4feaa762f74 Mon Sep 17 00:00:00 2001
From: Tim Otten <totten@civicrm.org>
Date: Tue, 5 Jul 2022 16:33:17 -0700
Subject: [PATCH] dev/core#3181 - Resolver - Compatibility fix for GLOBALS in
 PHP 8.1

---
 Civi/Core/Resolver.php | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/Civi/Core/Resolver.php b/Civi/Core/Resolver.php
index a3950c74e9..67d4689117 100644
--- a/Civi/Core/Resolver.php
+++ b/Civi/Core/Resolver.php
@@ -251,7 +251,8 @@ class ResolverApi {
 
 class ResolverGlobalCallback {
   private $mode;
-  private $path;
+  private $basePath;
+  private $subPath;
 
   /**
    * Class constructor.
@@ -259,10 +260,13 @@ class ResolverGlobalCallback {
    * @param string $mode
    *   'getter' or 'setter'.
    * @param string $path
+   *   Ex: 'dbLocale' <=> $GLOBALS['dbLocale']
+   *   Ex: 'civicrm_setting/domain/debug_enabled' <=> $GLOBALS['civicrm_setting']['domain']['debug_enabled']
    */
   public function __construct($mode, $path) {
     $this->mode = $mode;
-    $this->path = $path;
+    $this->subPath = explode('/', $path);
+    $this->basePath = array_shift($this->subPath);
   }
 
   /**
@@ -273,11 +277,12 @@ class ResolverGlobalCallback {
    * @return mixed
    */
   public function __invoke($arg1 = NULL) {
+    // For PHP 8.1+ compatibility, we resolve the first path-item before doing any array operations.
     if ($this->mode === 'getter') {
-      return \CRM_Utils_Array::pathGet($GLOBALS, explode('/', $this->path));
+      return \CRM_Utils_Array::pathGet($GLOBALS[$this->basePath], $this->subPath);
     }
     elseif ($this->mode === 'setter') {
-      \CRM_Utils_Array::pathSet($GLOBALS, explode('/', $this->path), $arg1);
+      \CRM_Utils_Array::pathSet($GLOBALS[$this->basePath], $this->subPath, $arg1);
       return NULL;
     }
     else {
-- 
2.25.1