When a class we are parsing extends a built-in PHP class in the root namespace (assuming it is even recognized correctly -- see 🐛 Parsing is incorrect for extends of root-namespace classes Active ), there is no link being made to php.net the way we do for functions.
Closed: won't fix
2.0
User interface
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
http://doc.php.net/downloads/json/php_manual_en.json is no longer available. We have an issue for that.
This issue might be too much work to link to known PHP code (via php.net). We removed vendor folders a while back, so probably we can even remove all PHP function calls.
I'm going to close the issue for now but feel free to discuss further if needed.