Are there specific security measures to consider when using PHP for web development?

When using PHP for web development, it is essential to consider security measures to prevent common vulnerabilities such as SQL injection, cross-site scripting (XSS), and CSRF attacks. To enhance security, developers should sanitize user input, use parameterized queries, validate and escape output data, and implement proper authentication and authorization mechanisms.

// Example of sanitizing user input to prevent SQL injection
$user_input = $_POST['username'];
$clean_input = mysqli_real_escape_string($connection, $user_input);
$query = "SELECT * FROM users WHERE username = '$clean_input'";
$result = mysqli_query($connection, $query);