Added a few lines so that if modules set the module name in a hidden field in their config.html then the form does not have to prefix all its variables. That makes it simpler to produce config.html by copy and paste from mod.html. Also then if the module provides a function modulename_process_options then the form variables can be processed by the module before being stored in $CFG.

admin/module.php

@@ -20,21 +20,36 @@
         if (!confirm_sesskey()) {
             error(get_string('confirmsesskeybad', 'error'));
         }
+        
+        if ($module = optional_param('module', '', PARAM_CLEANFILE)) {
+            // if the config.html contains a hidden form field giving
+            // the module name then the form does not have to prefix all
+            // its variable names, we will do it here.
+            $moduleprefix = $module.'_';
+            // let the module process the form data if it has to,
+            // $config is passed to this function by reference
+            require_once("$CFG->dirroot/mod/$module/lib.php");
+            $moduleconfig = $module.'_process_options';
+            if (function_exists($moduleconfig)) {
+                $moduleconfig($config);
+            }
+        } else {
+            $moduleprefix = '';
+        }
+
         print_header();
+
         foreach ($config as $name => $value) {
-            set_config($name, $value);
+            set_config($moduleprefix.$name, $value);
         }
         redirect("$CFG->wwwroot/$CFG->admin/modules.php", get_string("changessaved"), 1);
         exit;
-	}
+    }
 
 /// Otherwise print the form.
 
-    require_variable($module);
-
-    $module = clean_filename($module);
-	require_once("$CFG->dirroot/mod/$module/lib.php");
-
+    $module = required_param('module', '', PARAM_CLEANFILE);
+    require_once("$CFG->dirroot/mod/$module/lib.php");
 
     $stradmin = get_string("administration");
     $strconfiguration = get_string("configuration");
@@ -52,7 +67,7 @@
     echo "<br />";
 
     print_simple_box_start("center", "");
-	include("$CFG->dirroot/mod/$module/config.html");
+    include("$CFG->dirroot/mod/$module/config.html");
     print_simple_box_end();
 
     print_footer();