PTK Validation: Validate values of dates, files and directories

This package can validate values of dates, files and directories.

It can perform several types of validation for values that can represent different types of data.

For numbers it can check if the values and within a minimum and maximum, the value is a multiple of a given step value, or is present in a given list of allowed values.

For dates it can check if the date is valid, is withing a minimum or maximum value, or is it in a given valid list of days, months, years, or week days.

For files it can check if the directory is one of valid directories, has one of the allowed permissions, the size is within a minimum and maximum value, the type is one of the allowed types, the file name matches a pattern, the file is executable, a link, is readable or writeable, is an uploaded file, the file name extension is one of the allowed extensions, the MIME type is one of the allowed types.

For directories it can check if the path is a valid directory, it is readable or writeable, the directory is empty.