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WordPress插件开发的基本步骤是什么

注册会员 / 悠然自学 / 2023-06-11/ 浏览 95 次

WordPress插件开发的基本步骤如下:

  1. 创建插件目录并定义插件基本信息
/*
Plugin Name: My Plugin
Plugin URI: http://example.com/my-plugin
Description: My cool plugin.
Version: 1.0
Author: John Doe
Author URI: http://example.com
*/
 
  1. 添加插件菜单页面和处理逻辑
// 添加菜单页面
add_action('admin_menu', 'my_plugin_add_menu');

function my_plugin_add_menu() {
    add_menu_page(
        'My Plugin',
        'My Plugin',
        'manage_options',
        'my-plugin',
        'my_plugin_options_page'
    );
}

// 处理逻辑
function my_plugin_options_page() {
    if (!current_user_can('manage_options')) {
        wp_die('You do not have sufficient permissions to access this page.');
    }

    echo '<div class="wrap">';
    echo '<h2>My Plugin Options</h2>';
    echo '<p>Here is where the form would go if I actually had options.</p>';
    echo '</div>';
} 
  1. 添加插件设置页面和处理逻辑
// 添加设置页面
add_action('admin_init', 'my_plugin_settings_init');

function my_plugin_settings_init() {
    register_setting(
        'my-plugin-settings',
        'my_plugin_settings'
    );

    add_settings_section(
        'my-plugin-settings-section',
        'My Plugin Settings',
        'my_plugin_settings_section_callback',
        'my-plugin'
    );

    add_settings_field(
        'my-plugin-setting-name',
        'Setting Name',
        'my_plugin_setting_name_callback',
        'my-plugin',
        'my-plugin-settings-section'
    );

    // 添加更多设置字段
}

// 处理逻辑
function my_plugin_settings_section_callback() {
    echo '<p>Enter your settings below:</p>';
}

function my_plugin_setting_name_callback() {
    $options = get_option('my_plugin_settings');

    echo '<input type="text" id="my-plugin-setting-name" name="my_plugin_settings[setting_name]" value="' . esc_attr($options['setting_name']) . '">';
} 
  1. 添加插件短代码和处理逻辑
// 添加短代码
add_shortcode('my-plugin-shortcode', 'my_plugin_shortcode_callback');

function my_plugin_shortcode_callback() {
    return '<p>This is my plugin's shortcode!</p>';
} 
  1. 添加插件小工具和处理逻辑
// 添加小工具
add_action('widgets_init', 'my_plugin_register_widget');

function my_plugin_register_widget() {
    register_widget('My_Plugin_Widget');
}

class My_Plugin_Widget extends WP_Widget {

    public function __construct() {
        parent::__construct(
            'my_plugin_widget',
            'My Plugin Widget',
            array('description' => 'My Plugin Widget')
        );
    }

    public function widget($args, $instance) {
        echo $args['before_widget'];
        echo '<h2>' . $instance['title'] . '</h2>';
        echo '<p>This is my plugin's widget!</p>';
        echo $args['after_widget'];
    }

    public function form($instance) {
        $title = isset($instance['title']) ? $instance['title'] : '';

        echo '<p>';
        echo '<label for="' . $this->get_field_id('title') . '">Title:</label>';
        echo '<input class="widefat" id="' . $this->get_field_id('title') . '" name="' . $this->get_field_name('title') . '" type="text" value="' . esc_attr($title) . '">';
        echo '</p>';
    }

    public function update($new_instance, $old_instance) {
        $instance = array();
        $instance['title'] = (!empty($new_instance['title'])) ? strip_tags($new_instance['title']) : '';

        return $instance;
    }

} 
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