diff --git a/backup/moodle2/backup_customcert_activity_task.class.php b/backup/moodle2/backup_customcert_activity_task.class.php
index a071cc3..a4f2ae6 100644
--- a/backup/moodle2/backup_customcert_activity_task.class.php
+++ b/backup/moodle2/backup_customcert_activity_task.class.php
@@ -56,7 +56,7 @@ class backup_customcert_activity_task extends backup_activity_task {
      * @param string $content
      * @return mixed|string
      */
-    static public function encode_content_links($content) {
+    public static function encode_content_links($content) {
         global $CFG;
 
         $base = preg_quote($CFG->wwwroot, "/");
diff --git a/backup/moodle2/restore_customcert_activity_task.class.php b/backup/moodle2/restore_customcert_activity_task.class.php
index 39e6657..d21228e 100644
--- a/backup/moodle2/restore_customcert_activity_task.class.php
+++ b/backup/moodle2/restore_customcert_activity_task.class.php
@@ -53,7 +53,7 @@ class restore_customcert_activity_task extends restore_activity_task {
     /**
      * Define the contents in the activity that must be processed by the link decoder.
      */
-    static public function define_decode_contents() {
+    public static function define_decode_contents() {
         $contents = array();
 
         $contents[] = new restore_decode_content('customcert', array('intro'), 'customcert');
@@ -64,7 +64,7 @@ class restore_customcert_activity_task extends restore_activity_task {
     /**
      * Define the decoding rules for links belonging to the activity to be executed by the link decoder.
      */
-    static public function define_decode_rules() {
+    public static function define_decode_rules() {
         $rules = array();
 
         $rules[] = new restore_decode_rule('CUSTOMCERTVIEWBYID', '/mod/customcert/view.php?id=$1', 'course_module');
@@ -80,7 +80,7 @@ class restore_customcert_activity_task extends restore_activity_task {
      *
      * @return array the restore log rules
      */
-    static public function define_restore_log_rules() {
+    public static function define_restore_log_rules() {
         $rules = array();
 
         $rules[] = new restore_log_rule('customcert', 'add', 'view.php?id={course_module}', '{customcert}');
diff --git a/classes/element.php b/classes/element.php
index 4d1c8e0..b812639 100644
--- a/classes/element.php
+++ b/classes/element.php
@@ -377,7 +377,7 @@ abstract class element {
      * @param bool $preview true if it is a preview, false otherwise
      * @param \stdClass $user the user we are rendering this for
      */
-    public abstract function render($pdf, $preview, $user);
+    abstract public function render($pdf, $preview, $user);
 
     /**
      * Render the element in html.
@@ -389,7 +389,7 @@ abstract class element {
      *
      * @return string the html
      */
-    public abstract function render_html();
+    abstract public function render_html();
 
     /**
      * Handles deleting any data this element may have introduced.
diff --git a/my_certificates.php b/my_certificates.php
index 5ac04ea..71332aa 100644
--- a/my_certificates.php
+++ b/my_certificates.php
@@ -49,7 +49,7 @@ $user = \core_user::get_user($userid, '*', MUST_EXIST);
 
 // If we are viewing certificates that are not for the currently logged in user then do a capability check.
 if (($userid != $USER->id) && !has_capability('mod/customcert:viewallcertificates', context_system::instance())) {
-    print_error('You are not allowed to view these certificates');
+    throw new moodle_exception('You are not allowed to view these certificates');
 }
 
 $PAGE->set_url($pageurl);