滤器attachment_template 并返回自定义路径。有关详细信息，请参阅wp-includes/template.php, 作用get_query_template().

示例代码：

add_filter( \'attachment_template\', function( $template )
{
    global $post;

    // inspect $post object to determine the correct template
    // and change the file path, then:
    return $template;
});

您可以使用此代码，它首先在主题文件夹中查找，如果找不到，则在插件文件夹中查找。

Sample code:

add_action( \'template_redirect\', \'weinvent_template_redirect\' );

/*Template fallback*/
function weinvent_template_redirect() {

    global $wp, $wp_query;
    $plugindir  =   dirname( __FILE__ );

    if( is_attachment() ) {
        $templatefilename   =   \'image.php\';
        if( file_exists( TEMPLATEPATH . \'/\' . $templatefilename ) )  {
            $return_template    =   TEMPLATEPATH . \'/\' . $templatefilename;    
        }   else    {
            $return_template    =   $plugindir . \'/templates/\' . $templatefilename;
        }

        do_theme_redirect( $return_template );
    }              

}

function do_theme_redirect( $url ) {

    global $post, $wp_query;
    if( have_posts() )  {
        include($url);
        die();
    }   else    {
        $wp_query->is_404   =   true;
    }
}