如何获取主题或插件的注释标题数据

下面展示了如何在任何插件或主题中放置一个类，并且仍然能够从注释标题中获取任何主题或插件数据。例如，这对于更新设置/数据库选项非常有用。

你don\'t 了解：

如果是插件、mu插件或主题，以及容器/根主题或插件文件夹的嵌套深度注释：

mu插件也适用

/**
 * Plugin root
 * @return Full Path to plugin folder
 */
public function set_root_path() 
{
    $_path = trailingslashit( str_replace( basename( __FILE__ ), "", plugin_basename( __FILE__ ) ) );

    // Allow overriding the location
    $_path = apply_filters( __CLASS__.\'_root\', $_path );

    return $this->_path = $_path;
}


/**
 * Gets the data of the base \'theme\' / \'plugin\' / \'wpmuplugin\'
 * Performance: average loading time on a local (not vanilla) install for 1.000 runs: 0.0042 sec.
 * 
 * @param (mixed) $value
 * @return (array) $value | Theme/Plugin comment header data OR false on failure | default: \'Version\'
 */
public function get_data( $value = \'Version\' )
{
    // Class basename - String to Array
    $_path_data = explode( \'/\', $this->_path );
    // Get rid of the last element, as it\'s only a trailing slash
    array_pop( $_path_data );
    // reverse for faster processing
    krsort( $_path_data );

    // Themes basename
    $theme_roots = get_theme_roots();
    // In case some used register_theme_directory(); before
    // Might not work if an additional themes directory will be registered later
    // Thanks to @Thomas Scholz <http://toscho.de> for the hint
    if ( is_array( $theme_roots ) )
    {    
        foreach ( $_path_data as $_path_part )
        {
            foreach( $theme_roots as $root )
            {
                if ( in_array( $root, $_path_data ) )
                    $_theme_root = $root;
            }
        }
    }
    else 
    {
        // Get rid of the leading slash
        $_theme_root = str_replace( \'/\', \'\', $theme_roots );
    }

    // Plugins basename
    $_plugin_root = basename( WP_PLUGIN_DIR );


    # >>>> get file & load data
    $base_file = \'\';
    // Themes
    if ( in_array( $_theme_root, $_path_data ) )
    {
        foreach ( search_theme_directories() as $folder => $data )
        {
            foreach ( $_path_data as $_path_part )
            {
                if ( $_path_part == $folder )
                    $base_file = trailingslashit( $data[\'theme_root\'] ).$data[\'theme_file\'];
            }
        }

        $file_data = get_theme_data( $base_file );
    }
    // Plugins
    elseif( in_array( $_plugin_root, $_path_data ) )
    {
        $plugins = get_plugins();
        foreach ( $plugins as $plugin_file => $plugin_info )
        {
            $data   = explode( \'/\', $plugin_file );
            $file   = $data[1];
            foreach ( $_path_data as $_path_part )
            {
                if ( $_path_part !== $file )
                    $base_file = WP_CONTENT_DIR.$_type.\'/\'.$data[0].\'/\'.$data[1];
            }
        }

        $file_data = get_plugin_data( $base_file );
    }
    // WPMU Plugins
    else
    {
        // MU plugins basename - compatible for older MU too
        // Thanks (again) to @Thomas Scholz <http://toscho.de> for the hint that mu plugins really exists
        $mu_plugin_dir = ! version_compare( $GLOBALS[\'wp_version\'], \'3.0.0\', \'>=\' ) ? MUPLUGINDIR : WPMU_PLUGIN_DIR;
        $_mu_plugin_root = basename( $mu_plugin_dir );

        if ( ! in_array( $_mu_plugin_root, $_path_data ) )
            return false;

        $mu_plugins = get_mu_plugins();
        foreach ( $mu_plugins as $mu_plugin_file => $mu_plugin_info )
        {
            $data   = explode( \'/\', $mu_plugin_file );
            $file   = $data[1];
            foreach ( $_path_data as $_path_part )
            {
                if ( $_path_part !== $file )
                    $base_file = WP_CONTENT_DIR.$_type.\'/\'.$data[0].\'/\'.$data[1];
            }
        }

        $file_data = get_plugin_data( $base_file );
    }
    # <<<< get file & load data


    // return
    if ( ! empty ( $file_data ) )
        return $file_data[ $value ];

    // return false to determine that we couldn\'t load the comment header data
    return false;
}

echo $this->get_data( \'Author\' ); // The Plugin or Theme Author
echo $this->get_data( \'Version\' ); // The Plugin or Theme Version
echo $this->get_data( \'Name\' ); // The Plugin or Theme Name