简单示例

elementor-forms-ping-action/
|
├─ form-actions/
|  └─ ping.php
|
└─ elementor-forms-ping-action.php

<?php
/**
 * Plugin Name: Elementor Forms Ping Action
 * Description: Custom addon which will ping an external server.
 * Plugin URI:  https://elementor.com/
 * Version:     1.0.0
 * Author:      Elementor Developer
 * Author URI:  https://developers.elementor.com/
 * Text Domain: elementor-forms-ping-action
 *
 * Requires Plugins: elementor
 * Elementor tested up to: 3.25.0
 * Elementor Pro tested up to: 3.25.0
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly.
}

/**
 * Add new form action after form submission.
 *
 * @since 1.0.0
 * @param ElementorPro\Modules\Forms\Registrars\Form_Actions_Registrar $form_actions_registrar
 * @return void
 */
function add_new_ping_action( $form_actions_registrar ) {

    include_once( __DIR__ .  '/form-actions/ping.php' );

    $form_actions_registrar->register( new \Ping_Action_After_Submit() );

}
add_action( 'elementor_pro/forms/actions/register', 'add_new_ping_action' );

<?php
if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly.
}

/**
 * Elementor form ping action.
 *
 * Custom Elementor form action which will ping an external server.
 *
 * @since 1.0.0
 */
class Ping_Action_After_Submit extends \ElementorPro\Modules\Forms\Classes\Action_Base {

    /**
     * Get action name.
     *
     * Retrieve ping action name.
     *
     * @since 1.0.0
     * @access public
     * @return string
     */
    public function get_name(): string {
        return 'ping';
    }

    /**
     * Get action label.
     *
     * Retrieve ping action label.
     *
     * @since 1.0.0
     * @access public
     * @return string
     */
    public function get_label(): string {
        return esc_html__( 'Ping', 'elementor-forms-ping-action' );
    }

    /**
     * Run action.
     *
     * Ping an external server after form submission.
     *
     * @since 1.0.0
     * @access public
     * @param \ElementorPro\Modules\Forms\Classes\Form_Record  $record
     * @param \ElementorPro\Modules\Forms\Classes\Ajax_Handler $ajax_handler
     */
    public function run( $record, $ajax_handler ): void {

        wp_remote_post(
            'https://api.example.com/',
            [
                'method' => 'GET',
                'headers' => [
                    'Content-Type' => 'application/json',
                ],
                'body' => wp_json_encode([
                    'site' => get_home_url(),
                    'action' => 'Form submitted',
                ]),
                'httpversion' => '1.0',
                'timeout' => 60,
            ]
        );

    }

    /**
     * Register action controls.
     *
     * Ping action has no input fields to the form widget.
     *
     * @since 1.0.0
     * @access public
     * @param \Elementor\Widget_Base $widget
     */
    public function register_settings_section( $widget ): void {}

    /**
     * On export.
     *
     * Ping action has no fields to clear when exporting.
     *
     * @since 1.0.0
     * @access public
     * @param array $element
     */
    public function on_export( $element ): array {}

}