Imitation of iQiyi’s packaging database error

Question

It is exactly the same as the one in the video, but no data is output. It shows this stuff D:\wamp64\www\video\thinkphp\library\think\Debug.php:193:boolean false

Answer 1

Use mysql_error() to check the reason for failure.

Answer 2

Preliminary judgment, your database request data is a bool value. and is false. It may be that the database connection failed. Confirm that your database username and password are correct, and whether your php library exists

Answer 3

Are you sure there is data returned?