使用PHP按名称查找重复文件

Question

There are some modules in project which are being renamed or newly created or copied directly. Now I want to delete old directory files. So I want to find all files with their path which are having same name for clean up . (count > 2). That can be css, tpl, php or js files.

i.e.

Main\Games\troy.php
Main\Games\Child Games\troy.php
Main\Games\Sports\troy.php

If search is done on Main directory then search should return all 3 files and their paths. How to find duplicate files by PHP.

That will be useful also for finding duplicate files with same name in your drive like mp3, 3gp files.

Answer 1

function find_duplicate_files() {
    $names = scandir_recursive( 'D:\Main' );
    $files = array();
    foreach( $names as $name ) {
        if( count( $name ) > 1 ) {
            $files[] = $name;
        }
    }
    print_r( $files );
}

Function scandir_recursive() recursively parses the specified directory tree and creates an associative array whose keys are the file names found in all subdirectories, and whose values are the corresponding paths.

function scandir_recursive( $dir, &$result = array() ) {
    $dir = rtrim($dir, DIRECTORY_SEPARATOR);

    foreach ( scandir($dir) as $node ) {
        if ($node !== '.' and $node !== '..') {
            if (is_dir($dir . DIRECTORY_SEPARATOR . $node)) {
                scandir_recursive($dir . DIRECTORY_SEPARATOR . $node, $result);
            } else {
                $result[$node][] = $dir . DIRECTORY_SEPARATOR . $node;
            }
        }
    }
    return $result;
}

// It will output like

Array
(
    [0] => Array
        (
            [0] => D:\Main\Games\troy.php
            [1] => D:\Main\Games\Child Games\troy.php
            [2] => D:\Main\Games\Sports\troy.php 
        )

    [1] => Array
        (
            [0] => D:\Main\index.php
            [1] => D:\Main\Games\index.php
        )
)

From which we can identify which are duplicate files. It is useful when your code base is having large number of files. ( And I have used it a lot for finding duplicate music mp3 files :P )