What are some common pitfalls to avoid when using an "Affenformular" (form with submit button) in PHP?

One common pitfall to avoid when using an "Affenformular" in PHP is not properly sanitizing user input before processing it. This can lead to security vulnerabilities such as SQL injection or cross-site scripting attacks. To prevent this, always use functions like htmlspecialchars() or mysqli_real_escape_string() to sanitize user input before using it in your PHP code. 

// Example of sanitizing user input before processing it
if(isset($_POST['submit'])){
    $username = htmlspecialchars($_POST['username']);
    $password = htmlspecialchars($_POST['password']);
    
    // Now you can safely use $username and $password in your PHP code
}

Keywords

validation security CSRF error handling form submission

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