in these days of PHP > 5 you should be using the provided classes for this kind of thing. For this particular task you should be using the FilesystemIterator for example:-
$iterator = new FilesystemIterator('D:/dev/');
foreach($iterator as $fileInfo){
    if($fileInfo->isFile()){
        $cTime = new DateTime();
        $cTime->setTimestamp($fileInfo->getCTime());
        echo $fileInfo->getFileName() . " file Created " . $cTime->format('Y-m-d h:i:s') .  "<br/>\n";
    }
    if($fileInfo->isDir()){
        $cTime = new DateTime();
        $cTime->setTimestamp($fileInfo->getMTime());
        echo $fileInfo->getFileName() . " dir Modified " . $cTime->format('Y-m-d h:i:s') . "<br/>\n";
    }
}
Here $fileInfo is an instance of SplFileInfo which can give you all the information about a file or directory you could ever want.