Compression Streams

php://
data://
Supported Protocols and Wrappers
PHP Manual

# zlib://

# bzip2://

# zip://

zlib:// -- bzip2:// -- zip:// — Compression Streams

### Description

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.

ZIP extension registers zip: wrapper.

### Usage

- compress.zlib://file.gz
- compress.bzip2://file.bz2
- zip://archive.zip#dir/file.txt

### Options

Wrapper Summary
Attribute | Supported
--- | ---
Restricted by allow_url_fopen | No
Allows Reading | Yes
Allows Writing | Yes (except zip://)
Allows Appending | Yes (except zip://)
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

php://
data://
Supported Protocols and Wrappers
PHP Manual