/**
* Removes an item from the map by its key.
* This overrides the parent implementation by converting the key to lower case first if {@link case_sensitive} is FALSE.
* @param mixed $key the key of the item to be removed
* @return mixed the removed value, NULL if no such key exists.
*/
public function remove($key)
{
if ($this->case_sensitive) {
return parent::remove($key);
} else {
return parent::remove(strtolower($key));
}
}
