PHP Warning: mysql_connect() [function.mysql-connect]: Solution to Access denied

PHP Warning: mysql_connect() [function.mysql-connect]: Access denied solution

When using PHP to connect to the MySQL database, we may encounter "PHP Warning: mysql_connect() [ function.mysql-connect]: Access denied" error message. This error message means that our code was denied access when trying to connect to the MySQL database. So how to solve this error? This article will give readers a detailed introduction to how to solve "PHP Warning: mysql_connect() [function.mysql-connect]: Access denied".

1. Check MySQL username and password

First, we need to confirm whether our MySQL username and password are correct. We can try to log in to the MySQL database using the MySQL command line tool. If the login is successful, then we can be sure that the username and password we used are correct. If the login fails, it means we need to change the MySQL username and password, or reconnect to the database with the correct username and password.

2. Confirm MySQL host address

When connecting to the MySQL database, we need to specify the host address. Usually, we use "localhost" or "127.0.0.1" as the MySQL host address. If our code is running on a remote server, we need to use the IP address or domain name of the MySQL server as the host address. If the host address is incorrect, it will result in a connection refused error.

3. Confirm MySQL port number

By default, MySQL uses port number 3306 to listen for connection requests. If our MySQL server uses a different port number, you need to specify the correct port number when connecting to the MySQL database. Otherwise, we will also encounter the error message "PHP Warning: mysql_connect() [function.mysql-connect]: Access denied".

4. Confirm the permissions of the MySQL user

When connecting to the MySQL database, we need to use the username and password of the MySQL user. If the user does not have sufficient permissions to access the MySQL database, a connection refused error will result. We can use the "GRANT" command to assign appropriate permissions to the MySQL user to ensure that it can correctly connect to the MySQL database.

5. Confirm whether the MySQL database name is correct

When we connect to the MySQL database, we need to specify the correct database name. If the database name we specify does not exist, it will result in a connection refused error. We can use the MySQL command line tool to check whether the name of the database is correct. If the correct database does not exist, you will need to create a new database and use that database name when connecting to the MySQL database.

Summary

The "PHP Warning: mysql_connect() [function.mysql-connect]: Access denied" error is usually caused by using the wrong user name, password, and host address when connecting to the MySQL database. , port number, database name or the MySQL user does not have sufficient permissions to access the database. Through the confirmation and elimination of the above five steps, we can solve this problem more effectively. If we still cannot solve the problem, then we may need to contact the system administrator or MySQL developer for more detailed help.

The above is the detailed content of PHP Warning: mysql_connect() [function.mysql-connect]: Solution to Access denied. For more information, please follow other related articles on the PHP Chinese website!