note 88131 added to function.header

The manual is not completely precise on what PHP does (at least according to the PHP source in CVS) with Location: headers. This is the actual behaviour when you specify a Location: header, as far as I could derive: - If in earlier header() calls(*), a status code 201 or 300 - 307 was already specified, then that status code is retained - If no status code was specified, or if the status code specified earlier is not 201 or 300 ... 307 then: - If the request method is GET or HEAD then 302 "Found" is set - Otherwise (i.e. for POST or PUT), 303 "See Also" is set. Finally, if in the same header call you specify a custom status code, that one is always set (no matter its value), unless changed later again. Examples: <?php header("Location: moo.html"); ?> and <?php header("HTTP/1.1 404 Not Found"); header("Location: moo.html"); ?> set the status code to 302 when called with GET and to 303 when called with POST, and <?php header("Location: moo.html", true, 404); ?> and <?php header("Location: moo.html"); header("HTTP/1.1 404 Not Found"); ?> set the status code to 404. Note that combining a Location header with a status code other than 201 or 3xx does not really make much sense in HTTP <= 1.1 (hence PHP's behaviour); as such, the last three examples are just for illustrative purposes. (*) either through a header("HTTP/1.1 302 Found") - style call or through the third argument on a different header() call, i.e. header("Content-type: text/html", true, 302); (which does not make much sense, though) ---- Server IP: 83.137.20.135 Probable Submitter: 131.155.68.193 ---- Manual Page -- http://www.php.net/manual/en/function.header.php Edit -- https://master.php.net/note/edit/88131 Del: integrated -- https://master.php.net/note/delete/88131/integrated Del: useless -- https://master.php.net/note/delete/88131/useless Del: bad code -- https://master.php.net/note/delete/88131/bad+code Del: spam -- https://master.php.net/note/delete/88131/spam Del: non-english -- https://master.php.net/note/delete/88131/non-english Del: in docs -- https://master.php.net/note/delete/88131/in+docs Del: other reasons-- https://master.php.net/note/delete/88131 Reject -- https://master.php.net/note/reject/88131 Search -- https://master.php.net/manage/user-notes.php