filter Extension for safely dealing with input parameters derick Derick Rethans derick@php.net lead rasmus Rasmus Lerdorf rasmus@php.net lead The Input Filter extension is meant to address this issue by implementing a set of filters and mechanisms that users can use to safely access their input data. PHP beta 0.9.5 2006-02-?? - Fixed PECL bug #6639: uppercase hexadecimal digits are not supported. - Implemented PECL req #6641: negative values for hexadecimal and octal numbers are not supported.