Queste costanti sono definite da questa estensione e sono disponibili solo se l'estensione è stata compilata nel PHP o se è stata caricata dinamicamente a runtime.
FORCE_GZIP
(int)
FORCE_DEFLATE
(int)
ZLIB_ENCODING_RAW
(int)
DEFLATE algorithm as per RFC 1951.
ZLIB_ENCODING_DEFLATE
(int)
ZLIB compression algorithm as per RFC 1950.
ZLIB_ENCODING_GZIP
(int)
GZIP algorithm as per RFC 1952.
ZLIB_FILTERED
(int)
ZLIB_HUFFMAN_ONLY
(int)
ZLIB_FIXED
(int)
ZLIB_RLE
(int)
ZLIB_DEFAULT_STRATEGY
(int)
ZLIB_BLOCK
(int)
ZLIB_NO_FLUSH
(int)
ZLIB_PARTIAL_FLUSH
(int)
ZLIB_SYNC_FLUSH
(int)
ZLIB_FULL_FLUSH
(int)
ZLIB_FINISH
(int)
ZLIB_VERSION
(string)
zlib version number as a string.
ZLIB_VERNUM
(int)
zlib version number as an int.
ZLIB_OK
(int)
No errors or additional status information.
ZLIB_STREAM_END
(int)
Stream ended successfully.
ZLIB_NEED_DICT
(int)
Preset dictionary is needed.
ZLIB_ERRNO
(int)
File operation error.
ZLIB_STREAM_ERROR
(int)
Stream state is inconsistent or a parameter is invalid.
ZLIB_DATA_ERROR
(int)
Input data is corrupted.
ZLIB_MEM_ERROR
(int)
Insufficient memory.
ZLIB_BUF_ERROR
(int)
No progress is possible due to insufficient buffer space or unexpected ending of an input stream.
ZLIB_VERSION_ERROR
(int)
zlib library version is incompatible with the version assumed by the caller.