fix loop over config with missing regex section.

public_html/classes/redirect.class.php

@@ -23,6 +23,7 @@
  * 2019-04-25  v1.2  ah  use REQUEST_URI (works on Win and Linux)
  * 2020-05-06  v1.3  ah  added aliases for multiple domains with the same config
  * 2020-05-06  v1.4  ah  rewrite as class
+ * 2023-08-28  v1.5  ah  fix loop over config with missing regex section.
  */
 
 /**
@@ -229,13 +230,14 @@ class redirect {
             $aRedirect = $this->aConfig['direct'][$this->sRequest];
         } else {
             $this->_wd("no direct match ... scanning regex");
-            foreach (array_keys($this->aConfig['regex']) as $sRegex) {
-
-                $this->_wd("check if regex [$sRegex] matches $this->sRequest");
-                if (preg_match('#' . $sRegex . '#', $this->sRequest)) {
-                    $this->_wd("REGEX MATCH! aborting tests");
-                    $aRedirect = $this->aConfig['regex'][$sRegex];
-                    break;
+            if(isset($this->aConfig['regex']) && is_array($this->aConfig['regex'])){
+                foreach (array_keys($this->aConfig['regex']) as $sRegex) {
+                    $this->_wd("check if regex [$sRegex] matches $this->sRequest");
+                    if (preg_match('#' . $sRegex . '#', $this->sRequest)) {
+                        $this->_wd("REGEX MATCH! aborting tests");
+                        $aRedirect = $this->aConfig['regex'][$sRegex];
+                        break;
+                    }
                 }
             }
         }