(Yaf >=1.0.0)
Yaf_Response_Abstract::clearBody — 清除已經(jīng)設置的響應body
$key = ?): bool清除已經(jīng)設置的響應body
keythe content key, if you don't specific, then all contents will be cleared. 如果你沒(méi)選擇具體清除哪個(gè)key所對應的內容，那所有內容將被清除
注意:
this parameter is introduced as of 2.2.0