php 读取文件夹下所有文件

<?php
function listFiles($dir) {
    $files = array();
    if (is_dir($dir)) {
        if ($handle = opendir($dir)) {
            while (($file = readdir($handle)) !== false) {
                if ($file != "." && $file != "..") {
                    if (is_dir($dir . "/" . $file)) {
                        $files[$file] = listFiles($dir . "/" . $file);
                    } else {
                        $files[] = $dir . "/" . $file;
                    }
                }
            }
            closedir($handle);
        }
    }
    return $files;
}

$directory = "/path/to/your/directory";
$files = listFiles($directory);

foreach ($files as $file) {
    echo $file . "\n";
}
?>