Why am I getting a 'mysqli_connect(): (HY000/2002): Connection refused' warning in PHP?

PHP Warning: mysqli_connect() Connection Refused

The PHP warning "mysqli_connect(): (HY000/2002): Connection refused" indicates a failure in establishing a connection to the MySQL database. This can occur due to various reasons, including incorrect server settings, network issues, or firewall restrictions.

Potential Causes:

• Incorrect Server Settings: Ensure that MySQL is running and listening on the correct port. The default port for MAMP MySQL is 8889, which may differ from the port expected by PHP, which is typically 3306.
• Firewall Restrictions: Check if the firewall is blocking incoming connections on the MySQL port. Add an exception to allow MySQL connections.
• Network Issues: Verify that your computer and the MySQL database are connected to the same network.

Resolution:

According to the provided solution, the issue could be related to a port mismatch between MAMP and PHP. Try the following steps:

1. Open the MAMP preferences and navigate to the "MySQL" tab.
2. Change the MySQL port number to 3306.
3. Restart the MySQL server within MAMP.

Once the port mismatch is resolved, try connecting to MySQL using the provided PHP script. If the connection still fails, check for other underlying issues, such as firewall restrictions or incorrect credentials.

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