note 129772 added to function.get-headers

Some notes are using substr to get the response "code" in first ([0]) header after HTTP/1.X (depending on PHP version), but HTTP/2 is nearing a decade in existence and HTTP/3 is widely supported now, so a better, future proof parsing to extract that, according to specs, is: <?php $headers = get_headers($url, true); $response_code = explode(" ", $headers[0])[1]; ?> Also if you aren't blocking redirects with stream_context_create, take into account that $headers[0] is the response code of the requested URL, while the next resolved and followed redirect is at [1], so you should also do lookup the correct (last) response header first: <?php $response_header = $headers[max(array_filter(array_keys($headers), 'is_int'))]; ?> ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.137 (proxied: 80.91.90.170) ---- Manual Page -- https://php.net/manual/en/function.get-headers.php Edit -- https://main.php.net/note/edit/129772 Del: integrated -- https://main.php.net/note/delete/129772/integrated Del: useless -- https://main.php.net/note/delete/129772/useless Del: bad code -- https://main.php.net/note/delete/129772/bad+code Del: spam -- https://main.php.net/note/delete/129772/spam Del: non-english -- https://main.php.net/note/delete/129772/non-english Del: in docs -- https://main.php.net/note/delete/129772/in+docs Del: other reasons-- https://main.php.net/note/delete/129772 Reject -- https://main.php.net/note/reject/129772 Search -- https://main.php.net/manage/user-notes.php