A PHP filter is used to validate and filter data coming from insecure sources.By using filters you can be sure your application gets the correct input type.
* filter_var() – Filters a single variable with a specified filter
* filter_var_array() – Filter several variables with the same or different filters
* filter_input – Get one input variable and filter it
* filter_input_array – Get several input variables and filter them with the same or different filters
These filter useful for Validating filters(used to validate user input) and Sanitizing filters(used to allow or disallow specified characters in a string)
Remove all fashion functions to santize and validate user input.