PHP遍历某文件夹下的文件与文件夹名

<?php
//打开 images 目录
$dir = opendir("bkjia");

//列出 images 目录中的文件
while (($file = readdir($dir)) !== false)
{
	echo "filename: " . $file . "<br />";
}
closedir($dir);
?> 

filename: .
filename: ..
filename: cat.gif
filename: dog.gif
filename: food
filename: horse.gif

<?php

function getSubDirs($dir) 
{
	$subdirs = array();
	if(!$dh = opendir($dir)) 
		return $subdirs;
	$i = 0;
	while ($f = readdir($dh)) 
	{
     	if($f =='.' || $f =='..') 
			continue;
		//如果只要子目录名, path = $f;
 		//$path = $dir.'/'.$f;  
		$path = $f;
		$subdirs[$i] = $path;
		$i++;
	}
	return $subdirs;
}

$arr = getSubDirs("tmp");
print_r($arr); 
?>

Array ( [0] => Hello [1] => NowaMagic )