setup error handler to make (undefined array key) fatal

Author: simonLeary42

defaults/config.ini.default

@@ -17,6 +17,7 @@ allow_die = true ; internal use only
 enable_verbose_error_log = true ; internal use only
 enable_error_to_user = true ; internal use only
 enable_exception_handler = true ; internal use only
+enable_error_handler = true ; internal use only
 
 [ldap]
 uri = "ldap://identity"  ; URI of remote LDAP server

deployment/overrides/phpunit/config/config.ini

@@ -6,3 +6,4 @@ allow_die = false
 enable_verbose_error_log = false
 enable_error_to_user = false
 enable_exception_handler = false
+enable_error_handler = false

resources/init.php

@@ -17,6 +17,10 @@
     set_exception_handler(["UnityWebPortal\lib\UnityHTTPD", "exceptionHandler"]);
 }
 
+if (CONFIG["site"]["enable_error_handler"]) {
+    set_error_handler(["UnityWebPortal\lib\UnityHTTPD", "errorHandler"]);
+}
+
 session_start();
 
 if (isset($GLOBALS["ldapconn"])) {

resources/lib/UnityHTTPD.php

@@ -143,6 +143,14 @@ public static function exceptionHandler(\Throwable $e): void
         ini_set("log_errors", false); // error logged successfully
     }
 
+    public static function errorHandler(int $severity, string $message, string $file, int $line)
+    {
+        if (str_contains($message, "Undefined array key")) {
+            throw new ArrayKeyException($message);
+        }
+        return false;
+    }
+
     public static function getPostData(...$keys): mixed
     {
         try {