I would like to know, if there is such possibility as to point to a specific URL for FB sharing with its specific og metatags values when I click the share button (I am using ShareThis), BUT the website would lead to another URL containing anchor after clicking the post on FB?
The reason for this is that I have webpage which is basically just one dynamic page containing several sections which corresponds to different articles, thus the page has the same og metatags for all of them if I would share it as normally.
So I come to possible solution to point to a .php file which basically contains only HEAD og metatags for the specific article but would open that one-page site with the anchor in the URL that would make the site jump to the appropriate section once clicked on FB. I hope you do understand what I mean - english lng is not my native one, sorry.
Now the question is how to actually do it? How to make a specific .php file containing just the required og metatags would actually open another url containing acnhor after clicking the post in the FB? I tried redirection but it would collect the og metatags from the main one page site instead, which is wrong, of course.
IS THIS EVEN POSSIBLE, AND IF SO, THEN HOW?
This is the HTML code of that sharer php file I use:
<?php
// UPDATE: Even with this newly added suggestion by @CBroe it still does not work and FB Debugger see it as "broken" code
if((strpos($_SERVER['HTTP_USER_AGENT'], 'facebookexternalhit/1.1') !== 0)) {
header('Location: https://www.somedomainhere.com/#someAnchorHere01'), exit;
}
?>
<!DOCTYPE html>
<html lang="sk">
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Socnets sharer</title>
<meta name="description" content="Sharer temp page." />
<meta property="og:url" content="https://www.somedomainhere.com/php/_socnetshare-someNameHere01.php" />
<meta property="og:title" content="SOME TITLE HERE" />
<meta property="og:description" content="SOME DESCRIPTION HERE." />
<meta property="og:image" content="https://www.somedomainhere.com/img/some-image-here-fb.jpg" />
<meta property="og:image:width" content="1920" />
<meta property="og:image:height" content="1080" />
<meta property="og:image:type" content="image/jpeg" />
</head>
<body>
</body>
</html>
FB Debugger see all the parameters correctly - correct image is loaded, correct title and desc are there, everything, I just need to know/understand how to make it actually opening different url once clicked as a post on FB that is all...and redirecting it is not, as it automatically take all those og tags from the wrong page then.
$_SERVER['HTTP_USER_AGENT']. Check if that value starts withfacebookexternalhit/1.1(that covers the first two mentioned User Agent strings. The third one you can probably ignore, unless Facebook product catalogs were involved in what you are doing, but it doesn't sound like it.) Don't forget to use the Facebook sharing debugger to clear the cache, after you made changes. (And already existing post on FB will likely not change their behavior retroactively, so you'll need to make new ones to test, or refresh the share attachment if existing posts via the UI.)<?php if(!str_starts_with($_SERVER['HTTP_USER_AGENT'], 'facebookexternalhit/1.1')) { header('Location: ...'), exit; } ?>(If you are not using PHP 8 yet, then figure out what to use instead ofstr_starts_withto perform this check. And the Location header needs to contain the URL you want to redirect the human visitors to.)