note 70814 added to tutorial.useful

I'm a Java programmer looking at learning PHP, and I noticed that although the tutorial used !==, with two equals signs to indicate 'does not equal', I had instinctively used !=, with only one equals sign. This didn't make a difference to my code, though. Is there a difference? If so, what is it? I think this would be worth mentioning in the tutorial, as it has me wondering, and likely will be on the minds of others reading it. ---- Server IP: 66.163.161.117 Probable Submitter: 62.136.175.155 ---- Manual Page -- http://www.php.net/manual/en/tutorial.useful.php Edit -- https://master.php.net/note/edit/70814 Del: integrated -- https://master.php.net/note/delete/70814/integrated Del: useless -- https://master.php.net/note/delete/70814/useless Del: bad code -- https://master.php.net/note/delete/70814/bad+code Del: spam -- https://master.php.net/note/delete/70814/spam Del: non-english -- https://master.php.net/note/delete/70814/non-english Del: in docs -- https://master.php.net/note/delete/70814/in+docs Del: other reasons-- https://master.php.net/note/delete/70814 Reject -- https://master.php.net/note/reject/70814 Search -- https://master.php.net/manage/user-notes.php