Required Fields

/*

 * Modify the required fields for checkout

 *

 * Fields are identified by the input fields "name" attribute.

 *

 * This example shows how to make the last name field, which has a name attribute of "edd_last", required

 */

function pw_edd_purchase_form_required_fields( $required_fields ) {

 	// Set a field as required

    $required_fields['edd_last'] = array(   

        'error_id'      => 'invalid_last_name',

        'error_message' => __( 'Please enter your last name.', 'edd' )

    );

    /*

     * If you wanted to remove a field from required list

	 * you would simply unset the array key

	 */

    // unset( $required_fields['edd_first'] );

    return $required_fields;

}

add_filter( 'edd_purchase_form_required_fields', 'pw_edd_purchase_form_required_fields' );