note 129193 added to function.intval

Warning: intval() parses scientific notation, like "12.3e7". This comes out of the blue when you use intval() to cut the first integer value from a string; at first glance there's nothing wrong with it, if you have "123.jeff" it will give you 123, but in the rare case of parsing something that has a second segment with a hex number, you can easily run into this. (Let's not start the "why would you parse a string like that" argument.) So if you're not prepared, these results may surprise you: intval("123.ee-2") - gives you 123 intval("123.e2-e") - gives you 12300 intval("123.a2-e") - gives you 123 intval("123.e-22") - gives you 0 intval("123.e-a2") - gives you 123 intval("123.e-2a") - gives you 1 intval("123.2e2a") - gives you 12320 intval("123.22e2") - gives you 12322 intval("123.22ea") - gives you 123 Again, this is somewhat expected behaviour once you know that scientific notation is interpreted by it. But it looks like a less-than-widely known fact and I only faced this issue after 20+ years of php. ---- Server IP: 45.112.84.4 Probable Submitter: 45.91.157.134 (proxied: 2001:4c4c:1924:8700:707e:9854:fa4a:950) ---- Manual Page -- https://php.net/manual/en/function.intval.php Edit -- https://main.php.net/note/edit/129193 Del: integrated -- https://main.php.net/note/delete/129193/integrated Del: useless -- https://main.php.net/note/delete/129193/useless Del: bad code -- https://main.php.net/note/delete/129193/bad+code Del: spam -- https://main.php.net/note/delete/129193/spam Del: non-english -- https://main.php.net/note/delete/129193/non-english Del: in docs -- https://main.php.net/note/delete/129193/in+docs Del: other reasons-- https://main.php.net/note/delete/129193 Reject -- https://main.php.net/note/reject/129193 Search -- https://main.php.net/manage/user-notes.php