Why am I Getting the \'mysql_connect(): No Connection Could Be Made\' Error in PHP?

"mysql_connect(): No Connection Could Be Made" Error: Connecting to MySQL

When attempting to run a PHP MySQL script, you may encounter the error message "mysql_connect(): No connection could be made because the target machine actively refused it." This indicates that the connection to the MySQL database has been rejected.

The code provided in dbconnect.php is attempting to connect to the MySQL database using the following settings:

<code class="php">mysql_connect("localhost", "root");
mysql_select_db("users");</code>

While the code appears correct, the error message suggests that the connection is being refused by the target machine (the MySQL database).

Possible Causes and Solutions

• Incorrect Hostname or Port: Ensure that the hostname (localhost) and port (3306 by default) are correct. Try connecting to the database using 127.0.0.1 (loopback address) instead of localhost.
• Firewall Blocking: Check if the firewall on the target machine is blocking connections on the MySQL port. Allow access to Port 3306 in the firewall settings.
• UDP or TCP Issue: Verify that the MySQL database is listening on TCP, not UDP. The error message "No connection could be made because the target machine actively refused it" usually occurs when connecting to a UDP service instead of a TCP service.
• Unprivileged User Access: Ensure that the MySQL user specified in the connection parameters (root in this case) has sufficient privileges to access the database.
• Database Status: Verify that the MySQL database is running and accepting connections. If the database is not running, start the service and try connecting again.
• Incorrect Connection Syntax: Double-check the connection syntax and ensure that the proper mysql_connect() function is being used for your version of PHP and MySQL.

By addressing the above potential issues, you should be able to establish a connection to the MySQL database and resolve the "mysql_connect(): No connection could be made because the target machine actively refused it" error.

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