How to Add New Custom Filed ON Media Image Pages : WordPress

Hello Friends!! Hope you all are doing well :) In admin if you want to add new custom field on media details page then you can do it in a easy way. You will not need to edit in wordpress core files , using wordpress hooks you can do it by add the code in your theme function file. I am given to a example for add to new field "External URL", You will need to add the code in your theme function file.  

/** Add new Custom Field On Media detail page */
function add_custom_media_fields($form_fields, $post) {
    $form_fields["externalUrl"] = array(
        "label" => __("External URL"),
        "input" => "text", // this is default if "input" is omitted
        "value" => get_post_meta($post->ID, "externalUrl", true)
    );
     
    return $form_fields;
}
add_filter("attachment_fields_to_edit", "add_custom_media_fields", null, 2);
/** Save the new custom field value into database*/
function save_custom_media_fields($post, $attachment) {
    $my_data = sanitize_text_field( $attachment['externalUrl'] );
    update_post_meta( $post['ID'], 'externalUrl', $my_data );
return $post;
}
add_filter('attachment_fields_to_save', 'save_custom_media_fields', 10, 2);

        Hope you will all enjoy my code.