Update APIFilter.php

Fix encoding URI parameter issue.

Author: usernane

src/APIFilter.php

@@ -189,8 +189,8 @@ public static function filter(APIFilter $apiFilter, array $arr) {
             $defaultVal = $def[$paramIdx]->getDefault();
 
             if (isset($arr[$name])) {
-                $toBeFiltered = $arr[$name];
-                $retVal[$noFIdx][$name] = $arr[$name];
+                $toBeFiltered = urldecode($arr[$name]);
+                $retVal[$noFIdx][$name] = $toBeFiltered;
 
                 if (isset($def[$optIdx]['filter-func'])) {
                     $retVal[$filteredIdx][$name] = self::_applyCustomFilterFunc($def, $toBeFiltered);