Custom UTM column (User Analytics Extension)

If you add a hidden field to the form and label it “utm_source”, you can populate the field when it is displayed by adding this function to your theme’s functions.php:

function my_form_populate_field( $data, $field_id ) {
	if ( $_GET['UTM_source'] && 'utm_source' == $data['label'] ) {
		$data['default_value'] = $_GET['UTM_source'];
	}
	return $data;
}
add_action( 'ninja_forms_field', 'my_form_populate_field', 10, 2 );

The hidden field will be submitted with this value and will appear in the submission record.