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I have server side redirect page in PHP redirect.php this page redirects the user with PHP header() function:
header( 'location: mypage.html?test' );
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"/>
598
Since redirect.php redirects in every visit, it would be impossible. However, 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');
}
Reference
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