How can PHP developers ensure the security and efficiency of their online shop?

To ensure the security and efficiency of their online shop, PHP developers should implement secure coding practices, regularly update their PHP version and libraries, use parameterized queries to prevent SQL injection attacks, sanitize user input to prevent cross-site scripting attacks, and implement proper authentication and access control mechanisms. 

// Example of using parameterized queries to prevent SQL injection
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');
$stmt->bindParam(':username', $username);
$stmt->execute();

Keywords

SQL injection cross-site scripting password hashing HTTPS encryption input validation

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