php zip 文件比较类,比较两个zip文件的内容,返回新增,删除,及相同的文件列表。暂时只支持单层。
需求:上传一个zip文件,zip内有很多图片文件。需要对图片文件进行一系列很耗时的处理。当用户再更新zip文件时。判断zip内文件是否一致,只处理不同的文件。这样可以节省资源与时间,因此需要编写一个能够比较zip内文件的类。
ZipCompare.class.php
<?php /** Zip Compare class 比较两个zip文件的内容,返回新增,删除,及相同的文件列表,暂时只支持单层 * Date: 2014-05-18 * Author: fdipzone * Ver: 1.0 * * Func: * public compare 比较zip文件内容 * private getInfo 获取zip内文件列表 * private parse 分析两个zip的文件内容 * private check 检查zip文件是否正确 * private check_handler 检查服务器是否有安装unzip */ class ZipCompare{ // class start /** 比较zip文件内容,列出不相同的部分 * @param String $zipfile1 zip文件1 * @param String $zipfile2 zip文件2 * @return Array */ public function compare($zipfile1, $zipfile2){ // 检查是否有安装unzip if(!$this->check_handler()){ throw new Exception('unzip not install'); } // 检查zip文件 if(!$this->check($zipfile1) || !$this->check($zipfile2)){ throw new Exception('zipfile not exists or error'); } // 获取zip内文件列表 $zipinfo1 = $this->getInfo($zipfile1); $zipinfo2 = $this->getInfo($zipfile2); // 分析两个zip的文件内容,返回相同及不同的文件列表 return $this->parse($zipinfo1, $zipinfo2); } /** 获取zip内文件列表 * @param String $zipfile zip文件 * @return Array zip内文件列表 */ private function getInfo($zipfile){ // unzip -v fields $fields = array('Length','Method','Size','Cmpr','Date','Time','CRC-32','Name'); // zip verbose $verbose = shell_exec(sprintf("unzip -v %s | sed '\$d' | sed '\$d' | sed -n '4,\$p'", $zipfile)); // zip info $zipinfo = array(); $filelist = explode("\n", $verbose); if($filelist){ foreach($filelist as $rowdata){ if($rowdata==''){ continue; } $rowdata = preg_replace('/[ ]{2,}/', ' ', $rowdata); // 将两个或以上空格替换为一个 $tmp = array_slice(explode(' ', $rowdata), 1); // 去掉第一个空格 $file = array_combine($fields, $tmp); $zipinfo[$file['Name']] = $file['Length'].'_'.$file['CRC-32']; // 文件名,长度,CRC32,用于校验 } } return $zipinfo; } /** 分析两个zip文件内容 * @param String $zipinfo1 * @param String $zipinfo2 * @return Array */ private function parse($zipinfo1, $zipinfo2){ $result = array( 'add' => array(), // 新增 'del' => array(), // 缺少 'match' => array() // 匹配 ); if($zipinfo1 && $zipinfo2){ // 在zip1但不在zip2的文件 $result['add'] = array_values(array_diff(array_keys($zipinfo1), array_keys($zipinfo2))); // 在zip2但不在zip1的文件 $result['del'] = array_values(array_diff(array_keys($zipinfo2), array_keys($zipinfo1))); // 同时在zip1与zip2的文件 $match_file = array_values(array_diff(array_keys($zipinfo1), $result['add'])); // 检查相同文件名的文件内容是否匹配 for($i=0,$len=count($match_file); $i<$len; $i++){ if($zipinfo1[$match_file[$i]]==$zipinfo2[$match_file[$i]]){ // match array_push($result['match'], $match_file[$i]); }else{ // not match, change to add array_push($result['add'], $match_file[$i]); } } } return $result; } /** 检查zip文件是否正确 * @param String $zipfile zip文件 * @return boolean */ private function check($zipfile){ // 文件存在且能解压 return file_exists($zipfile) && shell_exec(sprintf('unzip -v %s | wc -l', $zipfile))>1; } /** 检查服务器是否有安装unzip * @return boolean */ private function check_handler(){ return strstr(shell_exec('unzip -v'), 'version')!=''; } } // class end ?>
demo
<?php require "ZipCompare.class.php"; $obj = new ZipCompare(); $result = $obj->compare('test1.zip','test2.zip'); print_r($result); ?>
执行后输出:
Array ( [add] => Array ( [0] => 9.jpg ) [del] => Array ( [0] => 5.jpg [1] => 6.jpg [2] => 7.jpg [3] => 8.jpg ) [match] => Array ( [0] => 1.jpg [1] => 10.jpg [2] => 11.jpg [3] => 12.jpg [4] => 13.jpg [5] => 14.jpg [6] => 15.jpg [7] => 16.jpg [8] => 17.jpg [9] => 18.jpg [10] => 2.jpg [11] => 3.jpg [12] => 4.jpg ) )
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