SQLSTATE[HY000] [2002] php_network_getaddresses: Temporary failure in name resolution

# Decoding the Connection Failure: Solving SQLSTATE[HY000] in Your Hosting Setup As a senior developer, I’ve seen countless developers struggle with seemingly simple connection errors that halt development. The error you are encountering—`SQLSTATE[HY000] [2002] php_network_getaddresses: Temporary failure in name resolution`—is frustrating because it sounds like a complex network issue, but often, the solution lies in a fundamental misunderstanding of how application configuration interacts with the hosting environment. This post will break down exactly why you are seeing this error when trying to run migrations or access phpMyAdmin, and provide the developer-centric steps required to fix your database connectivity. We will look closely at your `.env` file and the underlying network principles that govern database communication. ## Understanding the Error: Name Resolution Failure The core of your problem is not necessarily a database error itself, but a **network resolution failure**. The message `Temporary failure in name resolution` means that the PHP process (running Laravel or phpMyAdmin) cannot translate the hostname you provided (e.g., `www.sample_website.com`) into an actual IP address. In simple terms, your server can’t find the location of the database host. This is a DNS (Domain Name System) problem. For a connection to succeed, the system must successfully resolve the name to an IP address before it can initiate the TCP/IP connection to the MySQL server. ## The Fatal Flaw in Your `.env` Configuration Let’s examine the configuration you provided: ```dotenv DB_CONNECTION=mysql DB_HOST=http://www.sample_website.com <-- PROBLEM HERE DB_PORT=3306 DB_DATABASE=sample_db DB_USERNAME=sample_username DB_PASSWORD=secret ``` The critical mistake here is using the **HTTP protocol prefix (`http://`)** when defining `DB_HOST`. Database connections, especially to MySQL/MariaDB, are strictly TCP-based protocols that require only a hostname or an IP address. Prefixing the host with `http://` tells the system to try and resolve it as a web address, which often confuses underlying network libraries designed for raw socket connections. When you run `php artisan migrate`, Laravel attempts to establish this connection. Because of the incorrect protocol prefix, the networking layer fails during the name resolution phase, resulting in the `php_network_getaddresses` error. ## The Correct Configuration and Best Practices To fix this, you must adjust your `.env` file to reflect the actual address of your database server. ### 1. Use the Hostname or IP Directly For most standard hosting environments (especially shared or dedicated VPS setups), `DB_HOST` should contain only the server address. **Corrected Example:** ```dotenv DB_CONNECTION=mysql DB_HOST=www.sample_website.com // Or the actual IP address of your database server DB_PORT=3306 DB_DATABASE=sample_db DB_USERNAME=sample_username DB_PASSWORD=secret ``` ### 2. Troubleshooting Name Resolution Issues If correcting the protocol prefix does not resolve the issue, the problem shifts to systemic network issues on your host: * **Check DNS Records:** Ensure that the domain name you are using (`www.sample_website.com`) is correctly pointing to the server where the MySQL database resides. * **Firewall Rules:** Hosting providers often place strict firewall rules (like `iptables` or security groups) that can block outbound connections on specific ports, even if the DNS resolution works. Your hosting provider needs to ensure that traffic destined for port 3306 is permitted from your server environment. * **Host Type:** If you are using a managed service, confirm with your host documentation whether they support direct database connections via standard PHP configurations. For robust application development, ensuring reliable infrastructure is paramount, just as the principles behind strong architectural patterns discussed in frameworks like [Laravel](https://laravelcompany.com) emphasize stability. ## Conclusion The error `Temporary failure in name resolution` is a classic symptom of misconfigured connection strings, often masking deeper network or DNS issues. By removing the unnecessary protocol prefix (`http://`) from your `DB_HOST` and ensuring that the hostname resolves correctly to an IP address accessible over the network, you will resolve this problem immediately. Always treat database configuration as a precise act of network engineering, not just simple data entry. Happy coding!