How can one test if a selection list has been selected in PHP?

To test if a selection list has been selected in PHP, you can check if the corresponding value is present in the $_POST or $_GET superglobal arrays. If the selection list is a required field, you can also validate the selected value to ensure it meets your criteria. 

if(isset($_POST['selection_list'])) {
    $selected_value = $_POST['selection_list'];
    
    // Validate selected value if needed
    if($selected_value == 'option1' || $selected_value == 'option2') {
        // Selection list has been selected
        echo "Selection list has been selected with value: " . $selected_value;
    } else {
        // Invalid selection
        echo "Invalid selection";
    }
} else {
    // Selection list not selected
    echo "Selection list has not been selected";
}

Keywords

PHP selection list isset $_POST validation

Related Questions