使用PHP在文件夹中查找最旧的文件 [英] Find oldest file in a folder using PHP

问题描述

我需要一个PHP脚本，该脚本将在文件夹中找到最旧文件的日期.现在，我要遍历每个文件，并将其修改日期"与以前的文件进行比较，并保留最早的日期.

I need a PHP script that will find the date of the oldest file in a folder. Right now, I am iterating over every file and comparing it's Date Modified to the previous file and keeping the oldest date stored.

是否有较少的磁盘/内存密集型方式来执行此操作?该文件夹中大约有30万个文件.如果我在Windows资源管理器中打开该文件夹，它将按修改的日期自动排序，并且我看到最早的文件要快得多.有什么办法可以利用PHP脚本利用Explorer的默认排序方式?

Is there a less disk/memory intensive way to do this? There are about 300k files in the folder. If I open the folder in Windows Explorer, it will auto sort by date modified and I see the oldest file a lot faster. Is there any way I can take advantage of Explorer's default sort from a PHP script?

推荐答案

// Grab all files from the desired folder
$files = glob( './test/*.*' );

// Sort files by modified time, latest to earliest
// Use SORT_ASC in place of SORT_DESC for earliest to latest
array_multisort(
array_map( 'filemtime', $files ),
SORT_NUMERIC,
SORT_ASC,
$files
);

echo $files[0] // the latest modified file should be the first.

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祝你好运

要排除目录中的文件以减少不必要的搜索，

To exclude files in the directory to reduce unnecessary searches:

$files = glob( './test/*.*' );
$exclude_files = array('.', '..');
if (!in_array($files, $exclude_files)) {
// Sort files by modified time, latest to earliest
// Use SORT_ASC in place of SORT_DESC for earliest to latest
array_multisort(
array_map( 'filemtime', $files ),
SORT_NUMERIC,
SORT_ASC,
$files
);
}

echo $files[0];

如果您知道要查找的内容和可以排除的内容，这将很有帮助.

This is helpful if you know what to look for and what you can exclude.

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