Are there best practices for troubleshooting PHP database connection issues in a web server environment?

When troubleshooting PHP database connection issues in a web server environment, it's important to check the database credentials, ensure the database server is running, and verify that the necessary PHP extensions are enabled. Additionally, checking for any firewall restrictions or network connectivity issues can help resolve the problem. 

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
?>

Keywords

PHP database connection troubleshooting web server error types

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