Compression Streams

zlib: PHP 4.0.4 - PHP 4.2.3 (systems with fopencookie only)

compress.zlib:// and compress.bzip2:// PHP 4.3.0 and up

zlib: works like gzopen(), except that the stream can be used with fread() and the other filesystem functions. This is deprecated as of PHP 4.3.0 due to ambiguities with filenames containing ':' characters; use compress.zlib:// instead.

compress.zlib:// and compress.bzip2:// are equivalent to gzopen() and bzopen() respectively, and operate even on systems that do not support fopencookie.

Wrapper Summary
Attribute Supported
Restricted by allow_url_fopen No
Allows Reading Yes
Allows Writing Yes
Allows Appending Yes
Allows Simultaneous Reading and Writing No
Supports stat() No, use the normal file:// wrapper to stat compressed files.
Supports unlink() No, use the normal file:// wrapper to unlink compressed files.
Supports rename() No
Supports mkdir() No
Supports rmdir() No

ZIP extension registers zip: wrapper.