Explain by Darshan Hiranandani : How do I connect to a MySQL database using PHP?

Hi Everyone, I'm Darshan Hiranandani, I'm Explaining how do connect to a MySQL database using PHP?

To connect to a MySQL database using PHP, you can use either the mysqli extension or the PDO (PHP Data Objects) extension. Below are examples for both methods:

Using mysqli Extension

<?php
// Database credentials
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_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";

// Close connection
$conn->close();
?>

*Using PDO Extension
*
<?php
// Database credentials
$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";

try {
// Create a PDO instance
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// Set the PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
echo "Connected successfully";
} catch (PDOException $e) {
echo "Connection failed: " . $e->getMessage();
}

// Close connection
$conn = null;
?>

Explanation
Database Credentials:

$servername: The hostname or IP address of the MySQL server.
$username: The username for the MySQL database.
$password: The password for the MySQL database.
$dbname: The name of the MySQL database you want to connect to.
Using mysqli:

Create a connection using new mysqli().
Check the connection with $conn->connect_error.
Close the connection with $conn->close().
Using PDO:

Create a new PDO instance with the DSN (Data Source Name), username, and password.
Set the error mode to PDO::ERRMODE_EXCEPTION to throw exceptions on errors.
Close the connection by setting the PDO instance to null.
Choosing Between mysqli and PDO
mysqli: Procedural and object-oriented interface. Supports only MySQL.
PDO: Object-oriented interface. Supports multiple database types (MySQL, PostgreSQL, SQLite, etc.). Provides a more flexible and secure way to interact with databases.
Both methods are widely used, but PDO is recommended for its flexibility and support for multiple database types.