[list=1][]CHttpRequest::getPost()[color="#1C2837"][size="2"]: only $_POST data[/size][/color][][color="#1C2837"][size="2"]Yii::app()->request->getPost(): same as 1 just a different way to write[/size][/color][]CHttpRequest::getParam()[size="2"] - not getParam[/size]s[size="2"]: first searches in $_GET then in $_POST, else defaultValue => NULL by default[/size][][size="2"]$_REQUEST: standard php way to receive $_GET, $_POST and $_COOKIE, nothing to do with yii.[/size][*][size="2"]CHttpRequest::getQuery(): only $_GET data[/size][/list]