预定义常量

下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。

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)

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User Contributed Notes 2 notes

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diogoko at gmail dot com ¶

4 years ago


A tried at 3v4l.org and the first version to have the ZLIB_ENCODING_* constants was 5.4.0.

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dave dot mariano1991 at gmail dot com ¶

4 years ago


I'm noticing that all the ZLIB_ENCODING_* constants are documented to exist as of PHP 7.0, but I seem to be able to use them in PHP 5.5.9.

Could someone please confirm this documentation?

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官方地址：https://www.php.net/manual/en/zlib.constants.php

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预定义常量

User Contributed Notes 2 notes