fix: 🐛 Add check of key existence in template - unauth-acc-reg

The variable assignment has been missing checks if the keys exist in the
associative array. This might have caused error page to be displayed, or
at least the message has appeared in the logs. PR also includes small
refactoring in order of the commands and fixes HTML tags.

templates/unauthorized-access-go-to-registration-tpl.php

@@ -5,9 +5,7 @@
 use SimpleSAML\XHTML\Template;
 
 /**
- * Template for inform user that he/she will be redirected to registration
- *
- * Allow type hinting in IDE
+ * Template displaying information user that user will be redirected to registration page
  *
  * @var Template $this
  */
@@ -16,22 +14,22 @@
 $this->data['head'] = '<link rel="stylesheet"  media="screen" type="text/css" href="' .
     Module::getModuleUrl('perun/res/css/perun_identity_go_to_registration.css') . '" />';
 
+$params = $this->data['params'];
+if (isset($_POST['continueToRegistration'])) {
+    HTTP::redirectTrustedURL($_REQUEST['registerUrL'], $params);
+}
 $spMetadata = $this->data['SPMetadata'];
+
 $serviceName = '';
-$informationURL = '';
-$params = $this->data['params'];
-if ($spMetadata['name']['en']) {
+if (isset($spMetadata['name']['en'])) {
     $serviceName = $spMetadata['name']['en'];
 }
 
-if ($spMetadata['InformationURL']['en']) {
+$informationURL = '';
+if (isset($spMetadata['InformationURL']['en'])) {
     $informationURL = $spMetadata['InformationURL']['en'];
 }
 
-if (isset($_POST['continueToRegistration'])) {
-    HTTP::redirectTrustedURL($_REQUEST['registerUrL'], $params);
-}
-
 $this->includeAtTemplateBase('includes/header.php');
 
 $header = $this->t('{perun:perun:go-to-registration_header1}');
@@ -49,13 +47,12 @@
 ?>
 
     <form method="post">
-        </hr>
-        </br>
+        <hr/>
+        <br/>
         <input type="submit" name="continueToRegistration"
                value="<?php echo $this->t('{perun:perun:go-to-registration_continue}') ?>"
                class="btn btn-lg btn-primary btn-block">
-        <div class="form-group">
-        </div>
+        <div class="form-group"></div>
     </form>
 
 <?php