struct php_stream_filter

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;