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php实现比较两个文件夹异同的方法,
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php实现比较两个文件夹异同的方法,

Jun 13, 2016 am 09:00 AM
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php实现比较两个文件夹异同的方法,

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

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<&#63;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);

  }

 }

}

&#63;>

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希望本文所述对大家的php程序设计有所帮助。

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