note 106798 added to tutorial.useful

Suggesting a better way to detect the Firefox browser: I see that, at least for a recent download of the Firefox browser, the PHP command: <?php echo $_SERVER['HTTP_USER_AGENT']; ?> returns: Mozilla/5.0 (Windows NT 5.1; rv:8.0) Gecko/20100101 Firefox/8.0 ... So, note the term 'Firefox' in the returned string, and therefore you can search for the substring 'Firefox'. Therefore the PHP code: <?php if (strpos($_SERVER['HTTP_USER_AGENT'], 'Firefox') !== FALSE) { echo 'I see you are using Mozilla Firefox browser.<br />'; } ?> works just fine. ---- Server IP: 69.147.83.197 Probable Submitter: 75.69.184.188 ---- Manual Page -- http://www.php.net/manual/en/tutorial.useful.php Edit -- https://master.php.net/note/edit/106798 Del: integrated -- https://master.php.net/note/delete/106798/integrated Del: useless -- https://master.php.net/note/delete/106798/useless Del: bad code -- https://master.php.net/note/delete/106798/bad+code Del: spam -- https://master.php.net/note/delete/106798/spam Del: non-english -- https://master.php.net/note/delete/106798/non-english Del: in docs -- https://master.php.net/note/delete/106798/in+docs Del: other reasons-- https://master.php.net/note/delete/106798 Reject -- https://master.php.net/note/reject/106798 Search -- https://master.php.net/manage/user-notes.php