Performs a series of filters against variables in the
variables and returns the
results as an associative array. The context is one of
The optional parameter is an associative array where each element’s key is a variable name, with the associated value defining the filter and options to use to filter that variable’s value. The definition is either the ID of the filter to use or an array containing one or more of the following elements:
The ID of the filter to apply.
A bitfield of flags.
An associative array of options specific to the filter.