本文实例讲述了php实现比较两个文件夹异同的方法。分享给大家供大家参考。具体分析如下:
要求:
只能使用命令行,比较两个文件夹的不同,包括文件的差异。
思考:
虽然linux下有diff。。。。还是用php吧,代码改的方便,速度也很快,以下排除了.svn目录的比较
文件要比较md5校验和
思路:
1)把第一路径作为标准路径,列出第1个路径中有的,第2个路径中没有的文件或文件夹,或者是不同的文件。
2)然后,列出第2个路径中有的,第1个路径中却不存在的文件和文件夹。
调用示例:
php compare_folder.php /home/temp/2 /home/temp/55
代码如下:
<?php /** * 工具文件 * 目的在于递归比较两个文件夹 * * 调用示例 * php compare_folder.php /home/temp/2 /home/temp/55 * */ //参数确定 if (count($argv) > 1 ) $dir1 = del_postfix($argv[1]); else $dir1 = '/'; if (count($argv) > 2 ) $dir2 = del_postfix($argv[2]); else $dir2 = '/'; //检查第一个路径有,后者没有或错误的方法。 process_compare($dir1, $dir2, 0); echo "===========================================================\n"; //检查第2个路径的多余文件夹或文件 process_compare($dir2 , $dir1, 1); echo "all OK\n"; /** * 去除路径末尾的/,并确保是绝对路径 * * @param unknown_type $dir * @return unknown */ function del_postfix($dir) { if (!preg_match('#^/#', $dir)) { throw new Exception('参数必须是绝对路径'); } $dir = preg_replace('#/$#', '', $dir); return $dir; } /** * 公用函数,会调用一个递归方法实现比较 * * @param string $dir1 作为标准的路径 * @param string $dir2 对比用的路径 * @param int $only_check_has 为1表示不比较文件差异,为0表示还要比较文件的md5校验和 */ function process_compare($dir1, $dir2, $only_check_has){ compare_file_folder($dir1, $dir1, $dir2, $only_check_has); } /** * 真实的函数,私有函数 * * @param string $dir1 路径1,是标准 * @param string $base_dir1 不变的参数路径2 * @param string $base_dir2 不变的待比较的路径2 * @param int $only_check_has 为1表示不比较文件差异,为0表示还要比较文件的md5校验和 * */ function compare_file_folder($dir1, $base_dir1, $base_dir2, $only_check_has=0){ if (is_dir($dir1)) { $handle = dir($dir1); if ($dh = opendir($dir1)) { while ($entry = $handle->read()) { if (($entry != ".") && ($entry != "..") && ($entry != ".svn")){ $new = $dir1."/".$entry; //echo 'compare: ' . $new . "\n"; $other = preg_replace('#^'. $base_dir1 .'#' , $base_dir2, $new); if(is_dir($new)) { //比较 if (!is_dir($other)) { echo '!!not found direction: '. $other. ' (' . $new .")\n"; } compare_file_folder($new, $base_dir1,$base_dir2, $only_check_has) ; } else { //如果1是文件,则2也应该是文件 if (!is_file($other)) { echo '!!not found file: '. $other. ' ('.$new .")\n"; }elseif ($only_check_has ==0 && ( md5_file($other) != md5_file($new) ) ){ echo '!!file md5 error: '. $other. ' ('.$new .")\n"; } } } } closedir($dh); } } } ?>
希望本文所述对大家的php程序设计有所帮助。

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