What are the potential pitfalls of using 'localhost' versus '127.0.0.1' as the MySQL host in PHP?

Using 'localhost' as the MySQL host in PHP can sometimes cause connection issues due to the way it resolves to the local machine's IP address. Using '127.0.0.1' directly points to the loopback address, ensuring a more reliable connection. To avoid potential pitfalls, it is recommended to use '127.0.0.1' instead of 'localhost' when specifying the MySQL host in PHP. 

// Using '127.0.0.1' instead of 'localhost' as the MySQL host
$host = '127.0.0.1';
$username = 'your_username';
$password = 'your_password';
$database = 'your_database';

// Establish a connection to the MySQL database
$mysqli = new mysqli($host, $username, $password, $database);

// Check if the connection was successful
if ($mysqli->connect_error) {
    die("Connection failed: " . $mysqli->connect_error);
}

Keywords

localhost 127.0.0.1 MySQL host PHP

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