PHP compression and archiving—Bzip2

bzip2 function is used to transparently read and write bzip2 (.bz2) compressed files.

This module uses functions in Julian Seward’s » bzip2 library. This module requires bzip2/libbzip2 version >= 1.0.x.

PHP’s Bzip2 support is not turned on by default. The --with-bz2[=DIR] configuration option is required when compiling PHP to activate bzip2 support.

The following example opens a temporary file and writes a test string, and then outputs the contents of the file:

Example #1 bzip2 small example

<?php
    $filename = "/tmp/testfile.bz2";
    $str = "This is a test string.\n";
    // 打开一个文件用于写入
    $bz = bzopen($filename, "w");
    // 写入字符串到文件
    bzwrite($bz, $str);
    // 关闭文件
    bzclose($bz);
    // 打开文件用于读取
    $bz = bzopen($filename, "r");
    // 读取 10 个字符
    echo bzread($bz, 10);
    // 输出直到文件末尾（或者后面的 1024 个字符），并关闭。
    echo bzread($bz);
    bzclose($bz);
?>

Related functions:

bzclose — close a bzip2 file

bzcompress — Compress a string into bzip2 encoded data

bzdecompress — Decompress bzip2 encoded data

bzerrno — Return a bzip2 error code

bzerror — Return an array containing the bzip2 error number and error string

bzerrstr — Returns a bzip2 error string

bzflush — Forces writing of all write buffer data

bzopen — Opens a bzip2-compressed file

bzread — Binary safe reading of bzip2 files

bzwrite — Binary safe Write bzip2 files