Compression Streams

# zlib://

# bzip2://

# zip://

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

### Description

compress.zlib:// and compress.bzip2://

zlib: works like gzopen(), except that the stream can be used with fread() and the other filesystem functions. This is deprecated 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. As of PHP 7.2.0 and libzip 1.2.0+, support for the passwords for encrypted archives were added, allowing passwords to be supplied by stream contexts. Passwords can be set using the `'password'` stream context option.

### 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

### See Also

- Zlib context options

`↑` and `↓` to navigate • `Enter` to select • `Esc` to close • `/` to open