What potential pitfalls should be considered when handling radio buttons in PHP forms?

One potential pitfall when handling radio buttons in PHP forms is not properly validating the input to ensure that only one option is selected. To solve this issue, you can check if the radio button value is set and then sanitize and validate the input before processing it. 

// Check if radio button value is set
if(isset($_POST['radio_button'])){
    $selected_option = $_POST['radio_button'];
    
    // Sanitize and validate input
    if($selected_option === 'option1' || $selected_option === 'option2'){
        // Process the selected option
    } else {
        // Handle invalid input
    }
}

Keywords

radio buttons PHP forms validation security handling

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