What are the considerations for making a database accessible over the internet in a PHP application?

When making a database accessible over the internet in a PHP application, it is important to consider security measures to prevent unauthorized access. One way to achieve this is by using a secure connection such as HTTPS, implementing proper authentication and authorization mechanisms, and sanitizing user input to prevent SQL injection attacks. 

<?php

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

try {
    $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected successfully";
} catch(PDOException $e) {
    echo "Connection failed: " . $e->getMessage();
}

?>

Keywords

SQL injection PDO SSL encryption firewall remote access restrictions

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