note 69418 added to ref.session

I've just done a lot of debugging on a session that just wouldn't start, and finally found the problem after an hour and a half: <?php require_once('config.php'); // ... session_start(); // Rest of session stuff goes here ?> config.php: <?php // config stuff goes here ?> <-- BLANK LINE That blank line was outputted to the browser. That's not a major problem, unless you call a function that only works when nothing has been outputted to the browser yet. session_start() just happens to be one of them. So: - Call session_start() first thing, preferably before any require()s or include()s. - Never add a blank line after the ?> tag, as it might give others (or yourself) this kind of headaches. ---- Server IP: 194.109.193.119 Probable Submitter: 217.121.124.23 ---- Manual Page -- http://www.php.net/manual/en/ref.session.php Edit -- https://master.php.net/note/edit/69418 Del: integrated -- https://master.php.net/note/delete/69418/integrated Del: useless -- https://master.php.net/note/delete/69418/useless Del: bad code -- https://master.php.net/note/delete/69418/bad+code Del: spam -- https://master.php.net/note/delete/69418/spam Del: non-english -- https://master.php.net/note/delete/69418/non-english Del: in docs -- https://master.php.net/note/delete/69418/in+docs Del: other reasons-- https://master.php.net/note/delete/69418 Reject -- https://master.php.net/note/reject/69418 Search -- https://master.php.net/manage/user-notes.php