Are there any common pitfalls to avoid when working with form actions in PHP?

One common pitfall when working with form actions in PHP is not properly sanitizing user input, which can leave your application vulnerable to security risks such as SQL injection attacks. To avoid this, always use functions like `mysqli_real_escape_string()` or prepared statements to sanitize user input before using it in database queries. 

// Example of properly sanitizing user input before using it in a database query
$conn = mysqli_connect("localhost", "username", "password", "database");

// Assuming 'username' is a user input from a form
$username = mysqli_real_escape_string($conn, $_POST['username']);

$sql = "SELECT * FROM users WHERE username = '$username'";
$result = mysqli_query($conn, $sql);

// Rest of the code to handle the query result

Keywords

form actions PHP validation security error handling

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