使用PHP在文件夹中查找最旧的文件

<?php
$dir = "path/to/your/folder";
$oldest_file = null;
$oldest_time = time();

$files = glob($dir . '/*');
foreach ($files as $file) {
    if (is_file($file)) {
        $file_time = filemtime($file);
        if ($file_time < $oldest_time) {
            $oldest_time = $file_time;
            $oldest_file = $file;
        }
    }
}

echo "最旧的文件是：" . $oldest_file;
?>