SET和SELECT查询在PHP代码

Question

我有这样的PHP代码运行时不执行 - ：

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

这导致了这个错误 - ：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。但是令人惊讶的是，当相同的mysql查询在phpmyadmin中运行时，它会根据需要运行。

最新情况？感谢您的帮助......

Answer 1

你的问题是semicolone ;之前选择

尝试通过逗号,更换

像

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

，或者您也乌尔德这样分开查询

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