What is the correct method to retrieve radio button values in PHP forms?

When retrieving radio button values in PHP forms, you need to check which radio button is selected and then retrieve its value. This can be done by checking if the radio button is set in the $_POST array and then accessing its value. 

// Check if the radio button is set in the $_POST array
if(isset($_POST['radio_button'])){
    // Retrieve the selected radio button value
    $selected_value = $_POST['radio_button'];
    
    // Use the selected value as needed
    echo "Selected radio button value: " . $selected_value;
}

Keywords

PHP radio button form value retrieval

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