How can typographical errors in database connection settings impact the functionality of PHP code and how can they be identified and resolved effectively?

Typographical errors in database connection settings can cause PHP code to fail to establish a connection to the database, leading to errors or unexpected behavior in the application. To identify and resolve these errors effectively, carefully check the database connection settings for any typos in the hostname, username, password, or database name. 

// Incorrect database connection settings with typographical errors
$servername = "localhost";
$username = "user";
$password = "passw0rd";
$dbname = "mydatabase";

// Corrected database connection settings
$servername = "localhost";
$username = "root";
$password = "password";
$dbname = "mydatabase";

// 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

database connection typographical errors PHP code identification resolution

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