Prefixing names of new filter functions with filter_

Hmm. Should we take advantage of the EXPERIMENTAL warning on http://php.net/filter to rename most of the new filter functions to prefix them with filter_ so that we adhere to CODING_STANDARDS (Naming Conventions [2])? Rather than simply prefixing filter_ to the existing functions, I think we can make the function names more consistent with themselves and with precedents in PHP docs and other function names with the following changes: filter_data -- no change input_filters_list -> filter_names input_get_args -> filter_get_variable_array ("variable" matches terminology in http://php.net/manual/en/language.variables.external.php, array is explicit) input_get -> filter_get_variable (will sort alphabetically before filter_get_variable_array) input_has_variable -> filter_variable_exists (matches array_key_exists precedent) input_name_to_filter -> filter_id Oh, and theoretically the INPUT_* constants should get a FILTER_ prefix as well. So I'm throwing that against the wall to see if anything sticks. If there is agreement to the renaming, I'm pretty sure I can whip up a patch for the extension / unit tests / docs to get things back in sync. Dan