A.可以變魔術(shù)的函數(shù) B.以__開頭的函數(shù) C.可以在特定的情況下自動(dòng)調(diào)用的函數(shù) D.必須實(shí)現(xiàn)的函數(shù)
A.O:7:"Student":2:{s:4:"name";s:4:"qian";s:3:"age";s:25;} B.O:7:"Student":2:{s:4:"name";s:4:"qian";s:3:"age";i:25;} C.O:8:"Student":2:{s:4:"name";s:4:"qian";s:3:"age";s:25;} D.O:8:"Student":2:{s:4:"name";s:4:"qian";s:3:"age";i:25;}
A.執(zhí)行serialize()時(shí) B.當(dāng)對(duì)象復(fù)制完成時(shí) C.類被當(dāng)成字符串時(shí) D.當(dāng)程序試圖寫入一個(gè)不存在或者不可見的成員變量時(shí)