How can PHP developers ensure the security of a webshop application to protect user data and transactions?

To ensure the security of a webshop application and protect user data and transactions, PHP developers can implement secure coding practices such as input validation, using parameterized queries to prevent SQL injection attacks, implementing HTTPS encryption, and regularly updating PHP and its dependencies to patch security vulnerabilities. 

// Example of input validation to prevent SQL injection
$username = mysqli_real_escape_string($conn, $_POST['username']);
$password = mysqli_real_escape_string($conn, $_POST['password']);

// Example of using parameterized queries
$stmt = $conn->prepare("SELECT * FROM users WHERE username = ?");
$stmt->bind_param("s", $username);
$stmt->execute();
$result = $stmt->get_result();

// Example of implementing HTTPS encryption
if (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] !== 'on') {
    header("Location: https://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
    exit();
}

Keywords

SQL injection cross-site scripting encryption secure coding practices SSL/TLS.

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