有一天，我想知道如何讓 WordPress 插件選項由 JSON 文件控制，以便將來可以更輕松地添加其他設置，而無需調(diào)整代碼本身。

本文提供了一個極其簡單的 WordPress 插件示例，該插件的單個設置頁面由 2 個部分和 3 個字段/選項組成。

完整代碼可以在Github上找到。

設置基地

該插件最初由 3 個文件組成。

• adventures.json
• adventures.php
• class.adventures.php

adventures.php 帶有基本插件注冊：

<?php
/*
Plugin Name: Adventures
Plugin URI: https://mortenhartvig.dk
Description: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed pharetra nisi eu varius pellentesque. Aenean posuere, velit mollis sodales convallis, ipsum lectus feugiat nunc, ac auctor sapien enim eu metus.
Version: 1
Requires at least: 6.1
Requires PHP: 8.3
Author: Morten Hartvig
Author URI: https://mortenhartvig.dk
License: Do whatever you want
*/

define('ADV__PLUGIN_DIR', plugin_dir_path(__FILE__));
define('ADV__PLUGIN_VIEW', ADV__PLUGIN_DIR . 'views');
define('ADV__PLUGIN_SLUG', 'adv');

require_once ADV__PLUGIN_DIR . 'class.adventures.php';

(new Adventures());

class.adventures.php 帶有一個空類：

<?php

class Adventures {
    public function __construct() {

    }
}

adventures.json 包含插件設置的 JSON 結構：

{
    "settings": {
        "pages": [
            {
                "title": "Adventures",
                "capability": "manage_options",
                "slug": "adv"
            }
        ],
        "sections": [
            {
                "id": "portal_base",
                "title": "Base configuration",
                "description": "Lorem 1, ipsum dolor sit amet consectetur adipisicing elit. Cumque nulla in officiis. Laborum quisquam illo eaque, deserunt facere mollitia sint doloremque maiores, obcaecati reiciendis voluptate itaque iure fugiat quia architecto!",
                "view": "section"
            },
            {
                "id": "portal_appearance",
                "title": "Appearance",
                "description": "Lorem 2, ipsum dolor sit amet consectetur adipisicing elit. Cumque nulla in officiis. Laborum quisquam illo eaque, deserunt facere mollitia sint doloremque maiores, obcaecati reiciendis voluptate itaque iure fugiat quia architecto!",
                "view": "section"
            }
        ],
        "fields": [
            {
                "id": "adv_portal_key",
                "title": "Portal Key",
                "section": "portal_base",
                "type": "text",
                "placeholder": "Enter your portal key",
                "view": "field.text"
            },
            {
                "id": "adv_api_host",
                "title": "Host API",
                "section": "portal_base",
                "type": "text",
                "placeholder": "Enter API host",
                "default": "https://api.mortenhartvig.dk",
                "view": "field.text"
            },
            {
                "id": "adv_portal_theme",
                "title": "Theme",
                "section": "portal_appearance",
                "type": "select",
                "options": {
                    "rounded.v1": "Round (V1)",
                    "squared.v1": "Square (V1)",
                    "standard": "Standard"
                },
                "default": "standard",
                "view": "field.select"
            }
        ]
    }
}

讀取 JSON 數(shù)據(jù)

為您的設置創(chuàng)建一個屬性并調(diào)用 set_settings():

private $settings;

public function __construct() {
    $this->set_settings();
}

創(chuàng)建 set_settings() 和 get_json_data():

private function set_settings() {
    $data = $this->get_json_data();

    $this->settings = $data['settings'];
}

private function get_json_data() {
    $file = ADV__PLUGIN_DIR . 'adventures.json';

    if (!file_exists($file)) {
        die('adventures.json not found');
    }

    return json_decode(file_get_contents($file), true);
}

如果您將骰子(print_r($this->settings)) 添加到您的 __construct，您可以確認您確實已加載設置。

設置頁面

從構造函數(shù)中調(diào)用 init_hooks():

public function __construct() {
    $this->set_settings();
    $this->init_hooks();
}

創(chuàng)建init_hooks():

private function init_hooks() {
    add_action('admin_menu', [$this, 'register_settings_pages']);
}

創(chuàng)建register_settings_pages()和settings_page_callback()。

public function register_settings_pages() {
    foreach ($this->settings['pages'] as $page) {
        add_options_page($page['title'], $page['title'], $page['capability'], $page['slug'], [$this, 'settings_page_callback']);    
    }
}

public function settings_page_callback() {
    $this->render('settings.php');
}

創(chuàng)建渲染():

private function render($filename, $args) {
    if (is_array($args)) {
        $value = get_option($args['id']);

        if (empty($value) && isset($args['default'])) {
            $value = $args['default'];
        }

        $args = array_merge($args, ['value' => $value]);
    }

    $file = ADV__PLUGIN_VIEW . $filename;

    if (!str_ends_with($file,'.php')) {
        $file .= '.php';
    }

    if(!file_exists($file)) {
        die('File not found ' . $filename);
    }

    require $file;
}

創(chuàng)建views/settings.php：

<div>



<p><img src="/static/imghw/default1.png"  data-src="https://img.php.cn/upload/article/000/000/000/173390329693560.jpg"  class="lazy" alt="Creating WordPress plugin options based on a JSON structure" /></p>

<h3>
  
  
  Sections
</h3>

<p>Add another action in init_hooks:<br>
</p>

<pre class="brush:php;toolbar:false">private function init_hooks() {
    add_action('admin_menu', [$this, 'register_settings_pages']);
    add_action('admin_init', [$this, 'register_settings_sections']);
}

創(chuàng)建register_settings_sections()和settings_section_callback():

public function register_settings_sections() {
    foreach ($this->settings['sections'] as $section) {
        add_settings_section($section['id'], $section['title'], [$this, 'settings_section_callback'], ADV__PLUGIN_SLUG, $section);
    }
}

public function settings_section_callback($args) {
    $this->render($args['view'], $args);
}

創(chuàng)建views/section.php：

<p>
    <?php echo $args['description']; ?>
</p>

領域

在 init_hooks 中添加第三個操作：

private function init_hooks() {
    add_action('admin_menu', [$this, 'register_settings_pages']);
    add_action('admin_init', [$this, 'register_settings_sections']);
    add_action('admin_init', [$this, 'register_settings_fields']);
}

創(chuàng)建register_settings_fields()和settings_field_callback():

public function register_settings_fields() {
    foreach ($this->settings['fields'] as $field) {
        add_settings_field($field['id'], $field['title'], [$this, 'settings_field_callback'], ADV__PLUGIN_SLUG, $field['section'], $field);

        register_setting(ADV__PLUGIN_SLUG, $field['id']);
    }
}

public function settings_field_callback($args) {
    $this->render($args['view'], $args);
}

創(chuàng)建views/field.select.php：

<?php

$html_options = '';

foreach ($args['options'] as $key => $val) {
    $html_options .= sprintf('<option value="%s" %s >%s</option>', $key, selected($args['value'], $key, false), $val);
}

printf('<select name="%s">



<p>Create views/field.text.php:<br>
</p>

<pre class="brush:php;toolbar:false"><?php

printf('<input name="%s">



<h3>
  
  
  Saving
</h3>

<p>To view and save your options add a form to settings.php:<br>
</p>

<pre class="brush:php;toolbar:false"><div>



<p>Change an option and attempt to <em>Save</em>. The save should be successful.</p>

<p><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/173390329893991.jpg" class="lazy" alt="Creating WordPress plugin options based on a JSON structure"></p>

<p>Your settings are now saved and can be accessed throughout the site via:<br>
</p>

<pre class="brush:php;toolbar:false"><?php
echo get_option('adv_portal_theme'); // squared.v1

添加新字段

將以下 JSON 添加到 Adventures.json：

{
    "id": "adv_api_token",
    "title": "Host API Token",
    "section": "portal_base",
    "type": "text",
    "placeholder": "Enter API host token",
    "default": "",
    "view": "field.text"
}

它將自動添加到您的設置中：

以上是基于 JSON 結構創(chuàng)建 WordPress 插件選項的詳細內(nèi)容。更多信息請關注PHP中文網(wǎng)其他相關文章！