diff --git a/filter/manage.php b/filter/manage.php
index 024b19ff07b..b4a940bd18f 100644
--- a/filter/manage.php
+++ b/filter/manage.php
@@ -1,5 +1,4 @@
 <?php
-
 // This file is part of Moodle - http://moodle.org/
 //
 // Moodle is free software: you can redistribute it and/or modify
@@ -26,18 +25,18 @@
 require_once(__DIR__ . '/../config.php');
 require_once($CFG->libdir . '/adminlib.php');
 
-$contextid = required_param('contextid',PARAM_INT);
+$contextid = required_param('contextid', PARAM_INT);
 $forfilter = optional_param('filter', '', PARAM_SAFEDIR);
 $returnto  = optional_param('return', null, PARAM_ALPHANUMEXT);
 
 list($context, $course, $cm) = get_context_info_array($contextid);
 
-/// Check login and permissions.
+// Check login and permissions.
 require_login($course, false, $cm);
 require_capability('moodle/filter:manage', $context);
 $PAGE->set_context($context);
 
-$args = array('contextid'=>$contextid);
+$args = ['contextid' => $contextid];
 $baseurl = new moodle_url('/filter/manage.php', $args);
 if (!empty($forfilter)) {
     $args['filter'] = $forfilter;
@@ -48,7 +47,7 @@ if ($returnto !== null) {
 }
 
 // This is a policy decision, rather than something that would be impossible to implement.
-if (!in_array($context->contextlevel, array(CONTEXT_COURSECAT, CONTEXT_COURSE, CONTEXT_MODULE))) {
+if (!in_array($context->contextlevel, [CONTEXT_COURSECAT, CONTEXT_COURSE, CONTEXT_MODULE])) {
     throw new \moodle_exception('cannotcustomisefiltersblockuser', 'error');
 }
 
@@ -65,13 +64,13 @@ if ($context->contextlevel == CONTEXT_COURSECAT) {
     $PAGE->set_heading($PAGE->activityrecord->name);
 }
 
-/// Check login and permissions.
+// Check login and permissions.
 require_login($course, false, $cm);
 require_capability('moodle/filter:manage', $context);
 
 $PAGE->set_context($context);
 
-/// Get the list of available filters.
+// Get the list of available filters.
 $availablefilters = filter_get_available_in_context($context);
 if (!$isfrontpage && empty($availablefilters)) {
     throw new \moodle_exception('nofiltersenabled', 'error');
@@ -93,7 +92,7 @@ if ($forfilter) {
     }
 }
 
-/// Process any form submission.
+// Process any form submission.
 if ($forfilter == '' && optional_param('savechanges', false, PARAM_BOOL) && confirm_sesskey()) {
     foreach ($availablefilters as $filter => $filterinfo) {
         $newstate = optional_param($filter, false, PARAM_INT);
@@ -104,7 +103,7 @@ if ($forfilter == '' && optional_param('savechanges', false, PARAM_BOOL) && conf
     redirect($baseurl, get_string('changessaved'), 1);
 }
 
-/// Work out an appropriate page title.
+// Work out an appropriate page title.
 if ($forfilter) {
     $a = new stdClass;
     $a->filter = filter_get_name($forfilter);
@@ -113,7 +112,6 @@ if ($forfilter) {
 } else {
     $title = get_string('filtersettingsin', 'filters', $contextname);
 }
-$straction = get_string('filters', 'admin'); // Used by tabs.php
 
 // Print the header and tabs.
 $PAGE->set_cacheable(false);
@@ -122,7 +120,7 @@ $PAGE->set_pagelayout('admin');
 $PAGE->activityheader->disable();
 echo $OUTPUT->header();
 
-/// Print heading.
+// Print heading.
 echo $OUTPUT->heading_with_help($title, 'filtersettings', 'filters');
 
 if (empty($availablefilters)) {
@@ -144,33 +142,33 @@ if (empty($availablefilters)) {
     $stron = get_string('on', 'filters');
     $strdefaultoff = get_string('defaultx', 'filters', $stroff);
     $strdefaulton = get_string('defaultx', 'filters', $stron);
-    $activechoices = array(
+    $activechoices = [
         TEXTFILTER_INHERIT => '',
         TEXTFILTER_OFF => $stroff,
         TEXTFILTER_ON => $stron,
-    );
+    ];
 
-    echo html_writer::start_tag('form', array('action'=>$baseurl->out_omit_querystring(), 'method'=>'post'));
+    echo html_writer::start_tag('form', ['action' => $baseurl->out_omit_querystring(), 'method' => 'post']);
     echo html_writer::start_tag('div');
-    echo html_writer::empty_tag('input', array('type'=>'hidden', 'name'=>'sesskey', 'value'=>sesskey()));
+    echo html_writer::empty_tag('input', ['type' => 'hidden', 'name' => 'sesskey', 'value' => sesskey()]);
     foreach ($baseurl->params() as $key => $value) {
-        echo html_writer::empty_tag('input', array('type'=>'hidden', 'name'=>$key, 'value'=>$value));
+        echo html_writer::empty_tag('input', ['type' => 'hidden', 'name' => $key, 'value' => $value]);
     }
 
     $table = new html_table();
-    $table->head  = array(get_string('filter'), get_string('isactive', 'filters'));
-    $table->colclasses = array('leftalign', 'leftalign');
+    $table->head  = [get_string('filter'), get_string('isactive', 'filters')];
+    $table->colclasses = ['leftalign', 'leftalign'];
     if ($settingscol) {
         $table->head[] = $strsettings;
         $table->colclasses[] = 'leftalign';
     }
     $table->id = 'frontpagefiltersettings';
     $table->attributes['class'] = 'admintable generaltable';
-    $table->data = array();
+    $table->data = [];
 
-    // iterate through filters adding to display table
+    // Iterate through filters adding to display table.
     foreach ($availablefilters as $filter => $filterinfo) {
-        $row = array();
+        $row = [];
 
         // Filter name.
         $row[] = filter_get_name($filter);
@@ -181,15 +179,15 @@ if (empty($availablefilters)) {
         } else {
             $activechoices[TEXTFILTER_INHERIT] = $strdefaultoff;
         }
-        $select = html_writer::label($filterinfo->localstate, 'menu'. $filter, false, array('class' => 'accesshide'));
+        $select = html_writer::label($filterinfo->localstate, 'menu'. $filter, false, ['class' => 'accesshide']);
         $select .= html_writer::select($activechoices, $filter, $filterinfo->localstate, false);
         $row[] = $select;
 
-        // Settings link, if required
+        // Settings link, if required.
         if ($settingscol) {
             $settings = '';
             if ($filterinfo->hassettings) {
-                $settings = '<a href="' . $baseurl->out(true, array('filter'=>$filter)). '">' . $strsettings . '</a>';
+                $settings = '<a href="' . $baseurl->out(true, ['filter' => $filter]). '">' . $strsettings . '</a>';
             }
             $row[] = $settings;
         }
@@ -198,7 +196,7 @@ if (empty($availablefilters)) {
     }
 
     echo html_writer::table($table);
-    echo html_writer::start_tag('div', array('class'=>'buttons'));
+    echo html_writer::start_tag('div', ['class' => 'buttons']);
     $submitattr = ['type' => 'submit', 'name' => 'savechanges', 'value' => get_string('savechanges'), 'class' => 'btn btn-primary'];
     echo html_writer::empty_tag('input', $submitattr);
     echo html_writer::end_tag('div');
@@ -206,19 +204,18 @@ if (empty($availablefilters)) {
     echo html_writer::end_tag('form');
 }
 
-/// Appropriate back link.
+// Appropriate back link.
 if (!$isfrontpage) {
 
     if ($context->contextlevel === CONTEXT_COURSECAT && $returnto === 'management') {
-        $url = new moodle_url('/course/management.php', array('categoryid' => $context->instanceid));
+        $url = new moodle_url('/course/management.php', ['categoryid' => $context->instanceid]);
     } else {
         $url = $context->get_url();
     }
 
-    echo html_writer::start_tag('div', array('class'=>'backlink'));
-    echo html_writer::tag('a', get_string('backto', '', $contextname), array('href' => $url));
+    echo html_writer::start_tag('div', ['class' => 'backlink']);
+    echo html_writer::tag('a', get_string('backto', '', $contextname), ['href' => $url]);
     echo html_writer::end_tag('div');
 }
 
 echo $OUTPUT->footer();
-