Add `RewriteEngine On` to generated Apache mod_rewrite rules

Resolves #3930

diff --git a/wcfsetup/install/files/lib/data/option/OptionAction.class.php b/wcfsetup/install/files/lib/data/option/OptionAction.class.php
index 1d0b7ce563de29aa294b741559975f979d86347c..661dd51d38ee925ee2d4eb4b2d01193088d4bbc4 100644 (file)
--- a/wcfsetup/install/files/lib/data/option/OptionAction.class.php
+++ b/wcfsetup/install/files/lib/data/option/OptionAction.class.php
@@ -203,7 +203,7 @@ RewriteRule ^{$path}(.*)$ {$path}index.php?$1 [L,QSA]
 
 SNIPPET;
                 if (empty($rules['apache'][$htaccess])) {
-                    $rules['apache'][$htaccess] = $content;
+                    $rules['apache'][$htaccess] = "RewriteEngine On\n\n{$content}";
                 } else {
                     $rules['apache'][$htaccess] .= $content;
                 }