php读取目录及子目录下所有文件名的方法

$dir="./caxa/";
$file=scandir($dir);
print_r($file);

$dir = "/etc/php5/";
// Open a known directory, and proceed to read its contents
if (is_dir($dir)) {
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
echo "filename: $file : filetype: " . filetype($dir . $file) . "\n";
} closedir($dh);
}
}

function searchDir($path,&$data){
if(is_dir($path)){
$dp=dir($path);
while($file=$dp->read()){
if($file!='.'&& $file!='..'){
searchDir($path.'/'.$file,$data);
}
}
$dp->close();
}
if(is_file($path)){
$data[]=$path;
}
}

function getDir($dir){
$data=array();
searchDir($dir,$data);
return   $data;
}

print_r(getDir('.'));