How to install pear extension and decompression techniques for PHP

This article mainly introduces how to install pear extension and decompression techniques in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.

1. Use PHP’s own compression and archiving extension (phar)

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$phar = new PharData('song.tar.gz');
//路径 要解压的文件 是否覆盖
$phar->extractTo('c:/tmp', null, true);

2. First, you need to install the pear management tool

Under Linux

/usr/local/php/bin/pear install Archive_Tar

wamp does not install pear by default. go-pear.php is suitable for older versions, php5.3 needs to download go-pear.phar

Put the downloaded file in the php directory (any directory is acceptable) and execute php go-pear .phar command, press enter according to the prompt

①、Install

#这个类实际安装pear时默认就会安装
pear install archive_tar

②、

/**
原理：tar压缩包前512字节有自己的固定格式，根据这512个字节可以获取压缩包的文件名，大小等信息
在配合 gzopen，gzread 便可以解压gz格式
 */
$tar_object = new Archive_Tar("song.tar.gz");
$tar_object->extract('c:/tmp', true);

3. PHP calls external commands to perform decompression

//必须等命令执行完成，脚本才会推出，popen命令并非异步去执行
error_reporting(E_ALL);
ini_set("display_errors", 1);
$handle = popen("tar -xzvf song.tar.gz 2>&1", 'r');
/*
while(!feof($handle)) {
set_time_limit(3);
  $buffer = fgets($handle);
  echo "$buffer\n";
  ob_flush();
  flush();
}*/
echo "start \n";
pclose($handle);
echo "end \n";

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