在插件的基础上，我们应该不惜一切代价避免直接调用WordPress函数。最好的做法是将所有内容封装在相关的钩子中。
函数get_option使用起来是安全的，我们用它来处理include s。
对于其余部分，我们使用register_activation_hook来获取激活时的活动插件。要检查所需插件的激活/停用，我们可以使用hook activate_$pluginName和deactivate_$pluginName。主题状态更改可以使用hook after_switch_theme捕获。

<?php
/**
 * Plugin Name: (SO) Academy
 * Plugin URI: http://stackoverflow.com/a/22648487/1287812
 * Description: Activate plugin, check for others, show warnings
 * Version: 0.1b
 * Author: Victor Aurélio Santos, brasofilo
 */

define ('ACADEMY_INCLUDE', plugin_dir_path( __FILE__ ) . '/include');
define ('ACADEMY_TEMAPLE', ACADEMY_INCLUDE . '/templates');

$academy_err = get_option('academy_err');
if( !isset( $academy_err['woocommerce'] ) && !isset( $academy_err['anspress'] ) )
{
    include ACADEMY_INCLUDE . '/anspress-woocommerce.php';
}
if( !isset( $academy_err['theme'] ) ) {
    include ACADEMY_INCLUDE . '/buddypress/bp-loader.php';
    include ACADEMY_INCLUDE . '/news-feed.php';
}
include (ACADEMY_INCLUDE . '/settings.php');

register_activation_hook(   __FILE__, 'academy_on_activation' );
add_action( 'admin_notices', 'academy_admin_notices' );
add_action( 'activate_woocommerce/woocommerce.php', 'activate_plugin_woocommerce' );

function academy_on_activation()
{
    $academy_err = array();
    $plugin_dependencies = array( 
        'woocommerce' => 'woocommerce/woocommerce.php', 
        'anspress'    => 'anspress/anspress.php'
    );

    /* Dependencies check */
    foreach ( $plugin_dependencies as $plugin => $file ) 
    {
        if ( !is_plugin_active( $file ) ) 
        {
            $academy_err[$plugin] = "The {$plugin} plugin isn't installed and/or activated.";
        }
    }

    /* Check current theme, if not 'Academy' don't load files that depends... */
    if ( 'Academy' !== wp_get_theme()->Name )
    {
        $academy_err['theme'] = "Current theme isn't \"Academy\" not loading NewsFeed...";
    }   

    update_option( 'academy_err', $academy_err );
}

function academy_admin_notices() {
    $academy_err = get_option('academy_err');

    foreach ($academy_err as $err) 
    {
        ?>
        <div class="update-nag">
            <p>Academy Error: <?php echo $err; ?></p>
        </div>
        <?php
    }
}

function activate_plugin_woocommerce()
{
    $academy_err = get_option('academy_err');
    unset( $academy_err['woocommerce'] );
    update_option( 'academy_err', $academy_err );
}

字符串

• 从oop开始，去掉define s和global s*，here's a nice plugin base。

你的插件依赖于另一个名为'anspress'的插件，这就是为什么你会得到这个错误。这段代码是问题的根源：

$plugin_dependencies = array('woocommerce' => false,
                         'anspress' => false);

/* Dependencies check */
foreach ($plugin_dependencies as $plugin => &$enabled) {
  if (! $enabled = is_plugin_active("{$plugin}/{$plugin}.php") ) {
    $academy_err[] = "The {$plugin} plugin isn't installed and/or activated.";
  }
}

字符串
要么添加插件'anspress'，它被标记为依赖项，要么将其从该数组中删除。