<?php
    //use bzip2 + ZipArchive to reduce file size of your zip archives.
    $zip = new ZipArchive;
    $zip->open('i.zip',ZIPARCHIVE::CREATE|ZIPARCHIVE::OVERWRITE);
    $file='wuxiancheng.cn.sql';
    $bzFilename = $file.'.bz2';
    $sql = file_get_contents($file);
    $sql = bzcompress($sql,9);
    $zip->addFromString($bzFilename,$sql);
    $zip->setArchiveComment('zipped on '.date('Y-M-d'));
?>