What are the best practices for handling MySQL connections in PHP when querying a database for dropdown menu data?

When querying a database for dropdown menu data in PHP, it is important to efficiently handle MySQL connections to avoid performance issues. One best practice is to establish a connection to the database outside of the loop where the queries are executed, and close the connection once the queries are completed. This helps reduce the overhead of establishing and closing connections multiple times. 

// Establish a connection to the MySQL database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

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

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

// Query the database for dropdown menu data
$sql = "SELECT id, name FROM dropdown_data";
$result = $conn->query($sql);

// Close the MySQL connection
$conn->close();

Keywords

MySQL PHP database connection dropdown menu query.

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