diff -ru old/application/views/survey/frontpage/enterCaptcha.php new/application/views/survey/frontpage/enterCaptcha.php
--- old/application/views/survey/frontpage/enterCaptcha.php	2016-08-23 17:08:56.000000000 +0200
+++ new/application/views/survey/frontpage/enterCaptcha.php	2016-08-25 10:09:39.817659338 +0200
@@ -16,7 +16,7 @@
     </div>
     <?php endif; ?>
     <div class="container">
-        <?php echo CHtml::beginForm(array("/survey/index/sid/.$iSurveyId."), 'post', array(
+        <?php echo CHtml::beginForm(array("/survey/index/sid/{$iSurveyId}"), 'post', array(
             'id' => 'tokenform',
             'class' => 'form-horizontal col-sm-12 col-md-10 col-md-offset-1'
         )); ?>
diff -ru old/application/views/survey/frontpage/enterToken.php new/application/views/survey/frontpage/enterToken.php
--- old/application/views/survey/frontpage/enterToken.php	2016-08-23 17:08:56.000000000 +0200
+++ new/application/views/survey/frontpage/enterToken.php	2016-08-25 10:10:06.817793231 +0200
@@ -22,7 +22,7 @@
     <?php endif; ?>
 
     <div class="container">
-        <?php echo CHtml::beginForm(array("/survey/index/sid/.$iSurveyId."), 'post', array(
+        <?php echo CHtml::beginForm(array("/survey/index/sid/{$iSurveyId}"), 'post', array(
             'id' => 'tokenform',
             'class' => 'form-horizontal col-sm-12 col-md-10 col-md-offset-1'
         )); ?>