A.MySQL沒(méi)有正確安裝B.數(shù)據(jù)庫(kù)名、用戶(hù)名或密碼錯(cuò)誤C.網(wǎng)站域名錯(cuò)誤D.PHP的MySQL擴(kuò)展沒(méi)有開(kāi)啟
A.空格B.換行符號(hào)C.單引號(hào)D.雙引號(hào)
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