php查询所有文件

<?php

$dir = \'/Applications/MAMP/htdocs\';

function getDir($dir){
    if(!is_dir($dir)) return \'请提供正确的路径！\';
    $arr = [];
    $res = opendir($dir);
    while($list = readdir($res)){
        if($list == \'.\' || $list == \'..\'){
            continue;
        }
        $dirpath = $dir.\'/\'.$list;
        if(is_dir($dirpath)){
            $arr[$list] = getDir($dirpath);
        }else{
            $arr[] = $list;
        }
    }
    closedir($res);
    return $arr;
}
echo \'<pre>\';
print_r(getDir($dir));
echo \'</pre>\';