PHP在給定目錄中獲取最新保存的文件

Question

我有一個保存在特定目錄中的文件夾，其中包含一些上傳的圖像，通過使用php，我如何使用其路徑訪問該文件夾並返回此文件夾中最新添加（上傳）的圖像？

Answer 1

您必須掃描整個目錄並找到最新文件：

function getLatestFile($directoryPath) {
    $directoryPath = rtrim($directoryPath, '/');

    $max = ['path' => null, 'timestamp' => 0];

    foreach (scandir($directoryPath, SCANDIR_SORT_NONE) as $file) {
        $path = $directoryPath . '/' . $file;

        if (!is_file($path)) {
            continue;
        }

        $timestamp = filemtime($path);
        if ($timestamp > $max['timestamp']) {
            $max['path'] = $path;
            $max['timestamp'] = $timestamp;
        }
    }

    return $max['path'];
}

Answer 2

您需要使用filemtime()函數：

<?php
// outputs e.g.  somefile.txt was last modified: December 29 2002 22:16:23.

$filename = 'somefile.txt';
if (file_exists($filename)) {
    echo "$filename was last modified: " . date ("F d Y H:i:s.", filemtime($filename));
}
?>