How to compare the similarities and differences between two folders in PHP_PHP Tutorial

How to compare the similarities and differences of two folders in php

This article describes the example of how to compare the similarities and differences of two folders in php. Share it with everyone for your reference. The specific analysis is as follows:

Requirements:

You can only use the command line to compare the differences between two folders, including file differences.

Thinking:

Although there is diff under linux. . . . Let’s use PHP. Code modification is easy and fast. The comparison of .svn directories is excluded below

Files need to be compared with md5 checksums

Idea:

1) Use the first path as the standard path and list the files or folders that are in the first path but not in the second path, or are different files.

2) Then, list the files and folders that exist in the second path but do not exist in the first path.

Call example:

　php compare_folder.php /home/temp/2 /home/temp/55

The code is as follows:

　?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86

/** * Tool files * The purpose is to recursively compare two folders * * Call example * php compare_folder.php /home/temp/2 /home/temp/55 * */ //Parameter determined if (count($argv) > 1 ) $dir1 = del_postfix($argv[1]); else $dir1 = '/'; if (count($argv) > 2 ) $dir2 = del_postfix($argv[2]); else $dir2 = '/'; //Check that the first path exists, the latter does not or is wrong. process_compare($dir1, $dir2, 0); echo "============================================== ==============n"; //Check the second path for extra folders or files process_compare($dir2, $dir1, 1); echo "all OKn"; /** * Remove the / at the end of the path and make sure it is an absolute path * * @param unknown_type $dir * @return unknown */ function del_postfix($dir) { if (!preg_match('#^/#', $dir)) { throw new Exception('The parameter must be an absolute path'); } $dir = preg_replace('#/$#', '', $dir); return $dir; } /** * Public function, which will call a recursive method to implement comparison * * @param string $dir1 as the standard path * @param string $dir2 The path used for comparison * @param int $only_check_has If it is 1, it means not to compare the file differences, if it is 0, it means the md5 checksum of the file should also be compared */ function process_compare($dir1, $dir2, $only_check_has){ compare_file_folder($dir1, $dir1, $dir2, $only_check_has); } /** * Real function, private function * * @param string $dir1 path 1, which is standard * @param string $base_dir1 unchanged parameter path 2 * @param string $base_dir2 unchanged path 2 to be compared * @param int $only_check_has If it is 1, it means not to compare the file differences, if it is 0, it means the md5 checksum of the file should also be compared * */ function compare_file_folder($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。

http://www.bkjia.com/PHPjc/1018932.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/1018932.htmlTechArticlephp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...