Why Am I Getting 'PDOException: SQLSTATE[HY000] [2002] No Such File or Directory' When Connecting to My Database?

"PDOException: SQLSTATE[HY000] [2002] No Such File or Directory" Troubleshooting for Database Connectivity

Symptoms:

When attempting to use database-related commands like php artisan migrate or php artisan db:seed, users may encounter the error message:

[PDOException]
SQLSTATE[HY000] [2002] No such file or directory

Possible Causes and Solutions:

1. MySQL Server Not Running:

Verify that the MySQL server is up and running. If not, start it using the appropriate command.

2. Incorrect Hostname Configuration:

In Laravel 4, edit the app/config/database.php file and change the "host" field from "localhost" to "127.0.0.1".

In Laravel 5 , modify the .env file and change the "DB_HOST" variable from "localhost" to "127.0.0.1".

3. UNIX Socket vs. TCP Connection Type:

By default, "localhost" establishes a UNIX socket connection, which can fail to find the database if it's not located in the standard directory. Switching to "127.0.0.1" uses TCP (Transmission Control Protocol), which is more reliable in this scenario.

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