PHP连接到MySQL-访问被拒绝

Question

I have the following bit of code:

ob_start();
$host="localhost"; // Host name
$username="admin"; // Mysql username
$password=""; // Mysql password
$db_name="my_db_m"; // Database name
$tbl_name="members"; // Table name

// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB :".mysql_error());

// Define $myusername and $mypassword 
$myusername=$_POST['myusername']; 
$mypassword=$_POST['mypassword']; 

When I attempt to login, I get: cannot select DB :Access denied for user ''@'localhost' to database 'my_db_m'

I am using xampp. I used phpMyAdmin to create a database called 'my_db_m'. I created a table named 'members'.

Am I missing something? I am connecting to the mysql server yet unable to access the database...

Answer 1

You probably need to grant access to your admin user.

GRANT ALL ON my_db_m.* TO 'admin'@'localhost';

This is quite sweeping as it grants all rights, and you might want to restrict access for general use to something like

GRANT INSERT, UPDATE, SELECT, DELETE ON my_db_m.* TO 'admin'@'localhost';

Answer 2

Simple

GRANT USAGE ON my_db_m TO user@localhost IDENTIFIED BY 'passwd';

If you'd like to grant usage to any DB use:

GRANT USAGE ON *.*