php重定向网址与og元标记（开放图） [英] php redirect url with og metatag (open graph)
问题描述
我在PHP中有服务器端重定向页面 redirect.php 此页面使用PHP重定向用户 header（）功能：
I have server side redirect page in PHP redirect.php this page redirects the user with PHP header() function:
header( 'location: mypage.html?test' );
有没有办法添加一些OG元标记（Open Graph）
Is there a way to add some OG meta tags (Open Graph) in a way that when someone shares the redirect.php page on Facebook and similar websites, these properties would be applied?
<meta property="og:title" content="Facebook should load this when shared redirect.php"/>
推荐答案
由于 redirect.php 每次访问时重定向或/&执行它是不可能的，但是使用简单的如果语句，我们可以允许Facebook调试器读取页面OG元标签如下
Since redirect.php redirects whenever it's accessed or/& executed it would be impossible, but with a simple if statement we can allow Facebook Debugger to read the page OG meta tags as below
PHP
<?php
if (in_array($_SERVER['HTTP_USER_AGENT'], array(
'facebookexternalhit/1.1 (+https://www.facebook.com/externalhit_uatext.php)',
'facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)'
))) {
header("HTTP/1.1 200 OK");
print '<html prefix="og: http://ogp.me/ns#">
<head>
<title>{title}</title>
<meta property="og:title" content="{OG Title}" />
<meta property="og:type" content="website" />
<meta property="og:url" content="http://example.com" />
<meta property="og:image" content="http://example.com/og_img.jpg" />
</head>
</html>';
}
else {
// You're not Facebook agent '__'
header('Location: mypage.html?test');
}
请记住，这只适用于导致索引此页面的问题的Facebook bot在Google或Twitter上，所以建议您使用JavaScript location.href 。
Keep in mind this works only with Facebook bot which causes problems with indexing this page on Google or Twitter, so I suggest you using JavaScript location.href instead.
参考
- How to recognize Facebook User-Agent
这篇关于php重定向网址与og元标记（开放图）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
