<?php
header(’Content-type: text/html;charset=utf-8′);
error_reporting(E_ALL);
set_time_limit(0);

$zip_filename = “Test.zip”;

$zip_filename = key_exists(’zip’, $_GET) && $_GET['zip']?$_GET['zip']:$zip_filename;
$zip_filepath = str_replace(’\\’, ‘/’, dirname(__FILE__)) . ‘/’ . $zip_filename;

if(!is_file($zip_filepath))
{
    die(’文件”‘.$zip_filepath.’”不存在!’);
}

$zip = new ZipArchive();
$rs = $zip->open($zip_filepath);

if($rs !== TRUE)
{
    die(’解压失败!Error Code:’. $rs);
}

$zip->extractTo(’./’);
$zip->close();

echo $zip_filename.’解压成功!’;
?>
代码很简单，不过还是研究了好大一会手册
php配置中需要zlib支持
win下就是php_zip.dll