php - 在 PHP 代码中运行时未执行 SET 和 SELECT 查询

Question

我有这个php代码-：

$q = "SET @session = '1', @buddys = '12,7,10', @rejects = 'post_0'; SELECT f.* FROM feed as f"; $r = mysqli_num_rows($q);.

这会导致此错误 -: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT f.* FROM feed as f' at line 3。

但令人惊讶的是，当在 phpmyadmin 中运行相同的 mysql 查询时，它会根据需要运行。

怎么了？感谢帮助...

Answer 1

;你的问题是选择之前的分号

尝试用逗号替换它,

像那样

 $q = "SET @session = '1', @buddys = '12,7,10', @rejects = 'post_0' , SELECT f.* FROM feed as f";
  $r = mysqli_num_rows($q);

或者你也可以像这样分开你的查询

   $q = "SET @session = '1', @buddys = '12,7,10', @rejects = 'post_0' ";
   $q .= "SELECT f.* FROM feed as f";