A.explode(",",$stu)B.implode(",",$stu)C.explode($stu,",")D.implode($stu,",")
A.$_POST[’txt’]B.$_POST["txt"]C."$_POST[’txt’]"D."$_POST[txt]"
A.屬于表單標(biāo)記formB.屬于submit類型的按鈕C.點(diǎn)擊submit按鈕時(shí)觸發(fā)D.對應(yīng)的事件屬性是onsubmit