Please go through the code below. I have tried and tested 🙂
/**
* Adds a box to the side column on the Order edit screens.
* It checks if the order status is completed & then adds meta box.
*/
function add_drivers_meta_box() {
global $current_screen;
/* In the second condistion below, please change it to correct string for 'shipped' status */
if ( "shop_order" == $current_screen->post_type && "wc-completed" == get_post_status(get_query_var('post'))) {
add_meta_box(
'shipping_drivers',
__( 'Shipped by Driver', 'myplugin_textdomain' ),
'add_drivers_meta_box_callback',
'shop_order',
'side'
);
}
}
add_action( 'add_meta_boxes', 'add_drivers_meta_box' );
/**
* Prints the box content.
*
* @param WP_Post $post The object for the current post/page.
*/
function add_drivers_meta_box_callback( $post ) {
// Add a nonce field so we can check for it later.
wp_nonce_field( 'add_drivers_save_meta_box_data', 'add_drivers_meta_box_nonce' );
/*
* Use get_post_meta() to retrieve an existing value
* from the database and use the value for the form.
*/
$value = get_post_meta( $post->ID, '_shipping_driver_name', true );
echo '<label for="shipping_driver_list">';
_e( 'Select Driver Name', 'myplugin_textdomain' );
echo '</label> ';
/* Here you need to change the role to 'driver'. I kept it subscriber because I don't have 'driver' role registered ;-) */
$drivers = get_users( 'role=subscriber' );
echo '<select id="shipping_driver_list" name="shipping_driver_name" />';
foreach ( $drivers as $driver ) {
$value == $driver->display_name ? $selected = "selected" : $selected = "" ;
echo '<option value="'. esc_html( $driver->display_name ) .'" ' . $selected .'>' . esc_html( $driver->display_name ) . '</option>';
}
echo '</select>';
}
/**
* When the Order is saved, saves the Driver name.
*
* @param int $post_id The ID of the post being saved.
*/
function add_drivers_save_meta_box_data( $post_id ) {
/*
* We need to verify this came from our screen and with proper authorization,
* because the save_post action can be triggered at other times.
*/
// Check if our nonce is set.
if ( ! isset( $_POST['add_drivers_meta_box_nonce'] ) ) {
return;
}
// Verify that the nonce is valid.
if ( ! wp_verify_nonce( $_POST['add_drivers_meta_box_nonce'], 'add_drivers_save_meta_box_data' ) ) {
return;
}
// If this is an autosave, our form has not been submitted, so we don't want to do anything.
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
return;
}
// Check the user's permissions.
if ( isset( $_POST['post_type'] ) && 'shop_order' == $_POST['post_type'] ) {
if ( ! current_user_can( 'edit_page', $post_id ) ) {
return;
}
} else {
if ( ! current_user_can( 'edit_post', $post_id ) ) {
return;
}
}
/* OK, it's safe for us to save the data now. */
// Make sure that it is set.
if ( ! isset( $_POST['shipping_driver_name'] ) ) {
return;
}
// Sanitize user input.
$my_data = sanitize_text_field( $_POST['shipping_driver_name'] );
// Update the meta field in the database.
update_post_meta( $post_id, '_shipping_driver_name', $my_data );
}
add_action( 'save_post', 'add_drivers_save_meta_box_data' );