note 74001 deleted from function.is-numeric by felipe

Note Submitter: www.kigoobe.com ---- 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.,-