What are some common pitfalls when handling form data in PHP, especially with radio buttons?

One common pitfall when handling form data in PHP, especially with radio buttons, is not properly checking if the radio button is selected before accessing its value. To solve this issue, you should use isset() or !empty() to check if the radio button input is set before using its value in your PHP code. 

// Check if the radio button is selected before accessing its value
if(isset($_POST['radio_button'])){
    $selected_option = $_POST['radio_button'];
    // Use the selected option value here
} else {
    // Handle case where radio button is not selected
}

Keywords

validation sanitization $_POST radio buttons XSS

Related Questions