From 9f38628abc23e76f06a76f9f8e44655545c65669 Mon Sep 17 00:00:00 2001
From: Tim Hunt <T.J.Hunt@open.ac.uk>
Date: Mon, 25 Jun 2018 15:16:23 +0100
Subject: [PATCH] MDL-62792 filters: fix some bad PHPdocs

---
 lib/filterlib.php | 34 +++++++++++++++++++++++++++-------
 1 file changed, 27 insertions(+), 7 deletions(-)

diff --git a/lib/filterlib.php b/lib/filterlib.php
index 0a9753ba4f6..693922cd25f 100644
--- a/lib/filterlib.php
+++ b/lib/filterlib.php
@@ -302,15 +302,36 @@ class filter_manager {
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class null_filter_manager {
+    /**
+     * As for the equivalent {@link filter_manager} method.
+     *
+     * @param string $text The text to filter
+     * @param context $context not used.
+     * @param array $options not used
+     * @param array $skipfilters not used
+     * @return string resulting text.
+     */
     public function filter_text($text, $context, array $options = array(),
             array $skipfilters = null) {
         return $text;
     }
 
+    /**
+     * As for the equivalent {@link filter_manager} method.
+     *
+     * @param string $string The text to filter
+     * @param context $context not used.
+     * @return string resulting string
+     */
     public function filter_string($string, $context) {
         return $string;
     }
 
+    /**
+     * As for the equivalent {@link filter_manager} method.
+     *
+     * @deprecated Since Moodle 3.0 MDL-50491.
+     */
     public function text_filtering_hash() {
         throw new coding_exception('filter_manager::text_filtering_hash() can not be used any more');
     }
@@ -429,9 +450,9 @@ abstract class moodle_text_filter {
     /**
      * Override this function to actually implement the filtering.
      *
-     * @param $text some HTML content.
+     * @param string $text some HTML content to process.
      * @param array $options options passed to the filters
-     * @return the HTML content after the filtering has been applied.
+     * @return string the HTML content after the filtering has been applied.
      */
     public abstract function filter($text, array $options = array());
 }
@@ -520,8 +541,6 @@ function filter_get_name($filter) {
  * sorted in alphabetical order of name.
  */
 function filter_get_all_installed() {
-    global $CFG;
-
     $filternames = array();
     foreach (core_component::get_plugin_list('filter') as $filter => $fulldir) {
         if (is_readable("$fulldir/filter.php")) {
@@ -1428,9 +1447,10 @@ function filter_phrases($text, &$link_array, $ignoretagsopen=NULL, $ignoretagscl
 }
 
 /**
- * @todo Document this function
- * @param array $linkarray
- * @return array
+ * Remove duplicate from a list of {@link filterobject}.
+ *
+ * @param filterobject[] $linkarray a list of filterobject.
+ * @return filterobject[] the same list, but with dupicates removed.
  */
 function filter_remove_duplicates($linkarray) {