Php查找具有相似文件大小的文件并删除最旧的文件

Question

我正在尝试查找文件大小完全相同的文件，并将文件保持最新的文件大小，然后删除其他文件。

到目前为止，我正在浏览所有文件并获取最新的更改文件。

编辑我的代码当前代码删除了很多，但是仍然有3个文件大小相同的文件没有被正确删除（保留最新更改的一个删除其他文件）。

$files = glob($currentDir.'\*.jpg', GLOB_NOSORT);

$count = count($files);
$itemsToRemove = [];
for ($i = 0; $i < $count - 1; $i++) {
    for ($j = $i + 1; $j < $count; $j++) {
        // compare $z[$i] with $z[$j]...
        if(filesize($files[$i]) == filesize($files[$j])) {
            if(is_file($files[$j])) {
                $itemsToRemove[] = $files[$j];
            }
        }
    }
}

foreach($itemsToRemove as $item) {
    if(is_file($item)) {
        unlink($item);
    }
}

但是输出错误。它仍然显示一些重复的文件，并带有一些文件大小。我认为我将它们比较错了，我需要将每个值与数组中的所有其他值进行比较。

Answer 1

我想您的任务可以解决，例如：

$curSize = false;
foreach ($files as $file) {
    if ($curSize === false || filesize($file) !== $curSize) {
        $curSize = filesize($file);
    } else {
        unlink($file);
    }
}

Answer 2

我不确定这是否是您想要的，但希望您能从中获得帮助！ ：-）

<?php
$files = glob('*.jpg', GLOB_NOSORT);

//Get filetimes and only include unique filetimes (array_unique below)
$filetimes_arr = array_map('filemtime', $files);
array_multisort($filetimes_arr, SORT_NUMERIC, 
SORT_DESC, $files); //latest changed files 0,1...

//This would include only unique filetimes but still having same key as $files
$uniqe_times = array_unique($filetimes_arr); 

/*
example:

($files)
  0 => string 'brannebrona-e1536697041347-144x150.jpg' (length=38)
  1 => string 'brannebrona-e1536697041347-150x150.jpg' (length=38)
  2 => string 'brannebrona-e1536697041347-250x150.jpg' (length=38)
  3 => string 'brannebrona-e1536697041347-288x300.jpg' (length=38)
  4 => string 'brannebrona-e1536697041347-393x311.jpg' (length=38)
  5 => string 'brannebrona-e1536697041347-649x250.jpg' (length=38)
  6 => string 'brannebrona-e1536697041347-649x580.jpg' (length=38)
  7 => string 'brannebrona-e1536697041347.jpg' (length=30)
  8 => string 'brannebrona-e1536696975180.jpg' (length=30)
  9 => string 'brannebrona-e1536696959513.jpg' (length=30)
  10 => string 'brannebrona-1565x580.jpg' (length=24)
  11 => string 'brannebrona-250x150.jpg' (length=23)
  12 => string 'brannebrona-393x311.jpg' (length=23)
  13 => string 'brannebrona-1024x450.jpg' (length=24)
  14 => string 'brannebrona-1180x250.jpg' (length=24)
  15 => string 'brannebrona-150x150.jpg' (length=23)
  16 => string 'brannebrona-150x66.jpg' (length=22)
  17 => string 'brannebrona-300x132.jpg' (length=23)
  18 => string 'brannebrona-768x337.jpg' (length=23)
  19 => string 'brannebrona.jpg' (length=15)

($uniqe_times) (key intact with $files)
  0 => int 1536697041
  8 => int 1536696975
  9 => int 1536696959
  10 => int 1536696759
  13 => int 1536696758
  19 => int 1536696757

  (0-7 has the same filesize)
  (10-12 has the same filesize) 
  (13-18 has the same filesize)

  Go through the unique filesize array 
  and include the actual file you want
 */

 $use_files = array();
foreach($uniqe_times as $key=>$t) {
    $use_files[] = $files[$key];
}

//Go head and use the array $use_files