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Call to a member function query() on a non-object in原因

2015-01-17 11:13 来源: IT技术学习网原创 阅读:

本文给大家讲述php连接数据库报错"Fatal error: Call to a member function query() on a non-object in"的原因。

在用php查询数据库的时候,小编遇到报错如下:

Fatal error: Call to a member function query() on a non-object in D:\test\edit.php on line 16

经过检查,找到问题原因:

$dbh->query("SELECT * from tb_name")

我这句中的$dbh是不存在的。

请注意$dbh必须先创建,如:

$dbh=new PDO('mysql:host=127.0.0.1; dbname=dbname','username','password');

Call to a member function query() on a non-object in原因
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