MySQL查询在PHP

Question

打破我在PHP MySQL查询：

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

当我赞同它（用于调试）我看到这一点：

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 

什么是附近主题的问题='pcyear = 393 ??

请帮助

Answer 1

如果你回去echo $subject你会得到pcyear=393

检查并确保$subject正确分配我打赌。

Answer 2

你$主题变量被设置为subject='pcyear=393。