php - mysql查询在php中损坏

Question

我在 php 中有一个 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";

当我回显它（出于调试目的）时，我看到了：

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  

subject='pcyear=393附近有什么问题？

请帮忙

Answer 1

您的 $subject 变量设置为subject='pcyear=393。

Answer 2

我敢打赌，如果你回去，echo $subject你会得到pcyear=393

检查并确保$subject正确分配。