Zlib &reftitle.intro; This module enables you to transparently read and write gzip (.gz) compressed files, through versions of most of the filesystem functions which work with gzip-compressed files (and uncompressed files, too, but not with sockets). PHP comes with a fopen-wrapper for .gz-files. More information is available in the section about . &reference.zlib.setup; &reference.zlib.constants; &reference.zlib.examples; &reference.zlib.reference; &reference.zlib.deflatecontext; &reference.zlib.inflatecontext;