(no version information, might be only in CVS)
struct _php_stream_filter { php_stream_filter_ops *fops; void *abstract; /* for use by filter implementation */ php_stream_filter *next; php_stream_filter *prev; int is_persistent; /* link into stream and chain */ php_stream_filter_chain *chain; /* buffered buckets */ php_stream_bucket_brigade buffer; } php_stream_filter;