WordPress图片附件地址跳转到文章页面的方法

The method of jumping to the article page from the image attachment address in WordPress

wordpress图片附件在可以打开连接的情况下会出现一些意想不到的问题，尤其是会对SEO造成非常不利的影响。 可以打开连接的图片附件会有两个内容相同的url。 在自己的服务器上，发现百度蜘蛛会拼命抓取/?attachment_id=1的图片附件的url。 这些附件页面实际上除了图片之外都是空白的，这对SEO很不友好。 所以，我们需要将这些附件地址都跳转到附件所属的文章页面，那么如何才能自动将wordpress图片附件地址跳转到文章页面呢？ 请看下面的代码：

WordPress image attachments will have some unexpected problems when the connection can be opened, especially it will have a very adverse impact on SEO. Image attachments that can be opened will have two urls with the same content. On my own server, I found that Baidu Spider will desperately grab the url of the image attachment of /?attachment_id=1. These attachment pages are actually blank except for the pictures, which is very unfriendly to SEO. Therefore, we need to redirect these attachment addresses to the article page to which the attachment belongs, so how can we automatically redirect the wordpress image attachment address to the article page? Please see the code below:

将以下代码插入到您的主题 functions.php 文件中：

Insert the following code into your theme functions.php file:

/*
重定向附件页面到文章页
*/
add_action( 'template_redirect', 'wpse27119_template_redirect' );
function wpse27119_template_redirect()
{
// Get out of here if not headed to an attachment page	
if( ! is_attachment() ) return;	

// Find the $post variable representing the page where we're heading
global $post;
if( empty( $post ) ) $post = get_queried_object();	

// Check if post has a parent	
if ($post->post_parent)
	{
	// Yes so find permalink of parent post
	$link = get_permalink( $post->post_parent );
	// Redirect attachment to the parent post
	wp_redirect( $link, '301' );
	exit(); // always call exit after wp_redirect
	}
else	
	{
	// No parent so just redirect to home page
	wp_redirect( home_url(), '301' );
	exit(); // always call exit after wp_redirect
	}
}

这段代码仅对图片附件页面有效，原理是检查附件页面是否有相应文章页，如果有就自动301跳转到文章页，如果没有就跳转到网站首页。

来源：WordPress图片附件地址跳转到文章页面方法 | WordPress指南 (wpzhinan.com)