note 117552 deleted from function.is-numeric by crell

Note Submitter: Tim Robert-Fitzgerald ---- Be careful when using is_numeric() to validate user input and protect against SQL injection. According to wiki.hashphp.org, "Many people reach for is_numeric() thinking this is a good approach, and it will seem to work just fine. However the problem with is_numeric() isn't that it can't detect an integer, it is that it detects a lot more than just integers. All of the following are valid numbers to is_numeric(): - 1 - 1.123 - 0xFF - +0123.45e6 See the problem? If we really want just an integer, this function is too broad." Source: http://wiki.hashphp.org/Validation#Why_is_numeric.28.29_is_bad