Create a complete WordPress plugin that can be installed via the admin dashboard. The plugin should provide a full-featured email marketing system with the following capabilities: 📋 Core Features: Email List Management: Create, edit, delete email

					<?php

<?php

/**
 * Plugin Name: WP Turbo Email Marketing
 * Description: A full-featured email marketing system for managing email lists, campaigns, and more.
 * Version: 1.0
 * Author: WP Turbo
 * Author URI: https://wpturbo.dev
 * Text Domain: wpturbo
 */

namespace WPTurboEmailMarketing;

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

// Register custom post type for email lists
function wpturbo_register_email_lists() {
    $args = [
        'labels' => [
            'name' => __( 'Email Lists', 'wpturbo' ),
            'singular_name' => __( 'Email List', 'wpturbo' ),
        ],
        'public' => true,
        'has_archive' => true,
        'supports' => ['title', 'editor', 'custom-fields'],
    ];

    register_post_type( 'email_list', $args );
}

add_action( 'init', 'WPTurboEmailMarketingwpturbo_register_email_lists' );

// SMTP settings page
function wpturbo_add_smtp_settings_page() {
    add_options_page( 
        __( 'SMTP Settings', 'wpturbo' ), 
        __( 'SMTP Settings', 'wpturbo' ), 
        'manage_options', 
        'wpturbo-smtp-settings', 
        'wpturbo_render_smtp_settings_page' 
    );
}

add_action( 'admin_menu', 'WPTurboEmailMarketingwpturbo_add_smtp_settings_page' );

function wpturbo_render_smtp_settings_page() {
    ?>
    <div class="wrap">
        <h1><?php esc_html_e( 'SMTP Configuration', 'wpturbo' ); ?></h1>
        <form method="post" action="options.php">
            <?php
            settings_fields( 'wpturbo_smtp_options' ); 
            do_settings_sections( 'wpturbo_smtp_options' ); 
            ?>
            <table class="form-table">
                <tr valign="top">
                    <th scope="row"><?php esc_html_e( 'SMTP Host', 'wpturbo' ); ?></th>
                    <td><input type="text" name="smtp_host" value="<?php echo esc_attr( get_option('smtp_host') ); ?>" /></td>
                </tr>
                <tr valign="top">
                    <th scope="row"><?php esc_html_e( 'SMTP Port', 'wpturbo' ); ?></th>
                    <td><input type="number" name="smtp_port" value="<?php echo esc_attr( get_option('smtp_port') ); ?>" /></td>
                </tr>
                <tr valign="top">
                    <th scope="row"><?php esc_html_e( 'Username', 'wpturbo' ); ?></th>
                    <td><input type="text" name="smtp_username" value="<?php echo esc_attr( get_option('smtp_username') ); ?>" /></td>
                </tr>
                <tr valign="top">
                    <th scope="row"><?php esc_html_e( 'Password', 'wpturbo' ); ?></th>
                    <td><input type="password" name="smtp_password" value="<?php echo esc_attr( get_option('smtp_password') ); ?>" /></td>
                </tr>
                <tr valign="top">
                    <th scope="row"><?php esc_html_e( 'From Name', 'wpturbo' ); ?></th>
                    <td><input type="text" name="smtp_from_name" value="<?php echo esc_attr( get_option('smtp_from_name') ); ?>" /></td>
                </tr>
                <tr valign="top">
                    <th scope="row"><?php esc_html_e( 'From Email', 'wpturbo' ); ?></th>
                    <td><input type="email" name="smtp_from_email" value="<?php echo esc_attr( get_option('smtp_from_email') ); ?>" /></td>
                </tr>
            </table>
            <?php submit_button(); ?>
        </form>
    </div>
    <?php
}

function wpturbo_register_settings() {
    register_setting( 'wpturbo_smtp_options', 'smtp_host' );
    register_setting( 'wpturbo_smtp_options', 'smtp_port' );
    register_setting( 'wpturbo_smtp_options', 'smtp_username' );
    register_setting( 'wpturbo_smtp_options', 'smtp_password' );
    register_setting( 'wpturbo_smtp_options', 'smtp_from_name' );
    register_setting( 'wpturbo_smtp_options', 'smtp_from_email' );
}

add_action( 'admin_init', 'WPTurboEmailMarketingwpturbo_register_settings' );