Replaced deprecated FILTER_SANITIZE_STRING

Replaced with FILTER_SANITIZE_FULL_SPECIAL_CHARS. Equivalent to calling htmlspecialchars() with ENT_QUOTES set.

Author: TimZ99

user_guide_src/source/incoming/incomingrequest.rst

@@ -399,15 +399,15 @@ The methods provided by the parent classes that are available are:
         The second optional parameter lets you run the data through the PHP's
         filters. Pass in the desired filter type as the second parameter::
 
-            $request->getVar('some_data', FILTER_SANITIZE_STRING);
+            $request->getVar('some_data', FILTER_SANITIZE_FULL_SPECIAL_CHARS);
 
         To return an array of all POST items call without any parameters.
 
         To return all POST items and pass them through the filter, set the
         first parameter to null while setting the second parameter to the filter
         you want to use::
 
-            $request->getVar(null, FILTER_SANITIZE_STRING);
+            $request->getVar(null, FILTER_SANITIZE_FULL_SPECIAL_CHARS);
             // returns all POST items with string sanitation
 
         To return an array of multiple POST parameters, pass all the required keys as an array::
@@ -417,7 +417,7 @@ The methods provided by the parent classes that are available are:
         Same rule applied here, to retrieve the parameters with filtering, set the second parameter to
         the filter type to apply::
 
-            $request->getVar(['field1', 'field2'], FILTER_SANITIZE_STRING);
+            $request->getVar(['field1', 'field2'], FILTER_SANITIZE_FULL_SPECIAL_CHARS);
 
     .. php:method:: getGet([$index = null[, $filter = null[, $flags = null]]])
 
@@ -489,7 +489,7 @@ The methods provided by the parent classes that are available are:
         This method is identical to ``getPost()`` and ``getGet()``, only it fetches cookie data::
 
             $request->getCookie('some_cookie');
-            $request->getCookie('some_cookie', FILTER_SANITIZE_STRING); // with filter
+            $request->getCookie('some_cookie', FILTER_SANITIZE_FULL_SPECIAL_CHARS); // with filter
 
         To return an array of multiple cookie values, pass all the required keys as an array::