Function phper_sys::sapi_register_input_filter

pub unsafe extern "C" fn sapi_register_input_filter(
    input_filter: Option<unsafe extern "C" fn(arg: c_int, var: *const c_char, val: *mut *mut c_char, val_len: usize, new_val_len: *mut usize) -> c_uint>,
    input_filter_init: Option<unsafe extern "C" fn() -> c_uint>
) -> c_int