复杂示例

elementor-server-variable-dynamic-tag/
|
├─ dynamic-tags/
|  └─ server-variable-dynamic-tag.php
|
└─ elementor-server-variable-dynamic-tag.php

<?php
/**
 * Plugin Name: Elementor Server Variable Dynamic Tag
 * Description: Add dynamic tag that returns an server variable.
 * Plugin URI:  https://elementor.com/
 * Version:     1.0.0
 * Author:      Elementor Developer
 * Author URI:  https://developers.elementor.com/
 * Text Domain: elementor-server-variable-dynamic-tag
 *
 * 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.
}

/**
 * Register Request Variables Dynamic Tag Group.
 *
 * Register new dynamic tag group for Request Variables.
 *
 * @since 1.0.0
 * @param \Elementor\Core\DynamicTags\Manager $dynamic_tags_manager Elementor dynamic tags manager.
 * @return void
 */
function register_request_variables_dynamic_tag_group( $dynamic_tags_manager ) {

    $dynamic_tags_manager->register_group(
        'request-variables',
        [
            'title' => esc_html__( 'Request Variables', 'textdomain' )
        ]
    );

}
add_action( 'elementor/dynamic_tags/register', 'register_request_variables_dynamic_tag_group' );

/**
 * Register Server Variable Dynamic Tag.
 *
 * Include dynamic tag file and register tag class.
 *
 * @since 1.0.0
 * @param \Elementor\Core\DynamicTags\Manager $dynamic_tags_manager Elementor dynamic tags manager.
 * @return void
 */
function register_server_variable_dynamic_tag( $dynamic_tags_manager ) {

    require_once( __DIR__ . '/dynamic-tags/server-variable-dynamic-tag.php' );

    $dynamic_tags_manager->register( new \Elementor_Dynamic_Tag_Server_Variable );

}
add_action( 'elementor/dynamic_tags/register', 'register_server_variable_dynamic_tag' );

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

/**
 * Elementor Dynamic Tag - Server Variable
 *
 * Elementor dynamic tag that returns a server variable.
 *
 * @since 1.0.0
 */
class Elementor_Dynamic_Tag_Server_Variable extends \Elementor\Core\DynamicTags\Tag {

    /**
     * Get dynamic tag name.
     *
     * Retrieve the name of the server variable tag.
     *
     * @since 1.0.0
     * @access public
     * @return string Dynamic tag name.
     */
    public function get_name(): string {
        return 'server-variable';
    }

    /**
     * Get dynamic tag title.
     *
     * Returns the title of the server variable tag.
     *
     * @since 1.0.0
     * @access public
     * @return string Dynamic tag title.
     */
    public function get_title(): string {
        return esc_html__( 'Server Variable', 'textdomain' );
    }

    /**
     * Get dynamic tag groups.
     *
     * Retrieve the list of groups the server variable tag belongs to.
     *
     * @since 1.0.0
     * @access public
     * @return array Dynamic tag groups.
     */
    public function get_group(): array {
        return [ 'request-variables' ];
    }

/**
     * 获取动态标签分类。
     *
     * 检索服务器变量标签所属的分类列表。
     *
     * @since 1.0.0
     * @access public
     * @return array 动态标签分类。
     */
    public function get_categories(): array {
        return [ \Elementor\Modules\DynamicTags\Module::TEXT_CATEGORY ];
    }

    /**
     * 注册动态标签控件。
     *
     * 添加输入字段，允许用户自定义服务器变量标签设置。
     *
     * @since 1.0.0
     * @access protected
     * @return void
     */
    protected function register_controls(): void {
        $variables = [];

        foreach ( array_keys( $_SERVER ) as $variable ) {
            $variables[ $variable ] = ucwords( str_replace( '_', ' ', $variable ) );
        }

        $this->add_control(
            'user_selected_variable',
            [
                'type' => \Elementor\Controls_Manager::SELECT,
                'label' => esc_html__( '变量', 'textdomain' ),
                'options' => $variables,
            ]
        );
    }

    /**
     * 在前端渲染标签输出。
     *
     * 用 PHP 编写，用于生成最终的 HTML。
     *
     * @since 1.0.0
     * @access public
     * @return void
     */
    public function render(): void {
        $user_selected_variable = $this->get_settings( 'user_selected_variable' );

        if ( ! $user_selected_variable ) {
            return;
        }

        if ( ! isset( $_SERVER[ $user_selected_variable ] ) ) {
            return;
        }

        $value = $_SERVER[ $user_selected_variable ];
        echo wp_kses_post( $value );
    }

}