Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at 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.