note 74001 added to function.is-numeric

If you are looking for a way to check if the user input is a number, either positive or negative, or a decimal value (but not with an e, as in is_numeric), the following can be used - <?php mynumber = "3" // 3 is a number $mynumber = "3.3" // 3.3 is a number $mynumber = "-3.3" // -3.3 is a number $mynumber = "-0,3" // -0,3 is a number $mynumber = "-0,3x" // -0,3x is not a number if (preg_match ("/^([0-9.,-]+)$/", $mynumber)) { print $mynumber." is a number"; } else { print $mynumber." is not a number"; } ?> I have added comma (,) as in many european number system, decimal is expressed with a comma, and not with a dot. Like, $100 is expressed as $100,00 instead of $100.00 if you don't need that, remove the (,) and, you can add any additional value that you need to add after the series 0-9.,- ---- Server IP: 217.174.196.197 Probable Submitter: 86.69.194.197 ---- Manual Page -- http://www.php.net/manual/en/function.is-numeric.php Edit -- https://master.php.net/note/edit/74001 Del: integrated -- https://master.php.net/note/delete/74001/integrated Del: useless -- https://master.php.net/note/delete/74001/useless Del: bad code -- https://master.php.net/note/delete/74001/bad+code Del: spam -- https://master.php.net/note/delete/74001/spam Del: non-english -- https://master.php.net/note/delete/74001/non-english Del: in docs -- https://master.php.net/note/delete/74001/in+docs Del: other reasons-- https://master.php.net/note/delete/74001 Reject -- https://master.php.net/note/reject/74001 Search -- https://master.php.net/manage/user-notes.php