MySQL查詢在PHP

Question

打破我在PHP MySQL查詢：

$query = "SELECT serial FROM code WHERE type='".$type."' AND year='".$year."' AND subject='".$subject."' AND mounth='".$mounth."' AND day='".$day."' ORDER BY serial DESC LIMIT 1"; 

當我贊同它（用於調試）我看到這一點：

SELECT serial FROM code WHERE type='in' AND year='391' AND subject='pcyear=393' AND mounth='04' AND day='1' ORDER BY serial DESC LIMIT 1 

什麼是附近主題的問題='pcyear = 393 ??

請幫助

Answer 1

如果你回去echo $subject你會得到pcyear=393

檢查並確保$subject正確分配我打賭。

Answer 2

你$主題變量被設置爲subject='pcyear=393。