(no version information, might be only in CVS)
php_stream_filter_register_factory -- Registers a filter factory with the Streams API
Description
int 
php_stream_filter_register_factory ( const char * filterpattern, php_stream_filter_factory * factory)
     Use this function to register a filter factory with the name given by
     filterpattern.  filterpattern
     can be either a normal string name (i.e. myfilter) or
     a global pattern (i.e. myfilterclass.*) to allow a single
     filter to perform different operations depending on the exact name of the filter
     invoked (i.e. myfilterclass.foo, myfilterclass.bar,
     etc...)
    
注: 
      Filters registered by a loadable extension must be certain to call
      php_stream_filter_unregister_factory() during MSHUTDOWN.