Fix Textpattern >= 4.8.0 compatibility on PHP >= 8.1

CHANGELOG.md

@@ -1,6 +1,13 @@
 Changelog
 =====
 
+1.0.13 - 2022/04/22
+-----
+
+* Fixed: Textpattern >= 4.8 compatibility on PHP >= 8.1. Before would halt
+  to `trying to access array offset on value of type null` error about
+  `$txp_sections` global variable on PHP >= 8.1.
+
 1.0.12 - 2022/04/14
 -----
 

src/Textpattern/Composer/Installer/Textpattern/Inject.php

@@ -89,7 +89,7 @@ class Inject
     $is_article_list, $status, $id, $c, $context, $q, $m, $pg, $p, $month, $author, $request_uri, $qs,
     $subpath, $req, $page, $css, $pfr, $nolog, $has_article_tag, $txp_current_form, $parentid, $thisauthor,
     $thissection, $is_article_body, $stack_article, $thispage, $uPosted, $limit, $permlinks, $thiscategory,
-    $thisarticle, $variable, $thislink, $theme, $event, $step, $trace;
+    $thisarticle, $thisversion, $txp_sections, $variable, $thislink, $theme, $event, $step, $trace;
 
     Inject::$ready = true;
     Inject::$cwd = getcwd();
@@ -118,11 +118,13 @@ class Inject
         $trace = new \Trace();
     }
 
+    define('txp_version', get_pref('version'));
+    define('LANG', get_pref('language'));
+
     // Disable plugins during the updating and installing.
     // Loading plugins here would cause a FATAL error when invoking
     // plugin's updater callback, as the plugin would be evaluated
     // twice.
-
     Inject::$plugins = get_pref('use_plugins', 1, true);
     Inject::$admin_side_plugins = get_pref('admin_side_plugins', 1, true);
     set_pref('use_plugins', 0);