文件目录和删除文件PHP？

Question

I'm trying to create php script to scan directory and delete file in this directory. I have problem with my scanning file extension is not working right

<?php 
 if ($handle = opendir(''))
 {
    echo " Directory handle: $handle 
";
    echo "Entries: 
";


    while (false !== ($entry = readdir($handle))) 
    {
        echo" $entry :
";
        $file_parts = pathinfo($entry);

        switch ($file_parts['extension']) 
        {
            case 'dmg':
                echo "dmg";
                break;

            default:
                echo "no file";
                break;

        }


    }

    closedir($handle);

}


?>

Notice: Undefined index: extension in /Applications/MAMP/htdocs/dir.php on line 13

Answer 1

This error would be caused if for example the path doesn't have an extension or some error occured.

If you want to retreive the filetype of the files it seems like a roundabout way of doing so when you can just do

switch(filetype($dir.$file)){
      case 'dmg' ://And so on
}

Here $dir would be /Users/username/Downloads