PHP Filter Functions

filter_has_var

Checks if variable of specified type exists

filter_id

Returns the filter ID belonging to a named filter

filter_input_array

Gets external variables and optionally filters them

filter_input

Gets a specific external variable by name and optionally filters it

filter_list

Returns a list of all supported filters

filter_var_array

Gets multiple variables and optionally filters them

filter_var

Filters a variable with a specified filter