How can errors in handling special characters in form inputs be debugged in PHP?

Special characters in form inputs can cause errors in PHP if they are not properly handled. To debug this issue, you can use PHP's htmlspecialchars() function to convert special characters to HTML entities before processing the form input. This will prevent any potential issues with special characters interfering with your PHP code.

// Example of handling special characters in form inputs
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $input = htmlspecialchars($_POST["input"]);
    
    // Process the sanitized input further
    // ...
}