scandir - Error when running my php script

I have these errors when running my script.

failed to open dir: No such file or directory in /Applications/MAMP/htdocs/sites-store/word/word2.php on line 6

Warning: scandir(): (errno 2): No such file or directory in /Applications/MAMP/htdocs/sites-store/word/word2.php on line 6

Warning: array_diff(): Argument #1 is not an array in /Applications/MAMP/htdocs/sites-store/word/word2.php on line 6

Warning: Invalid argument supplied for foreach() in /Applications/MAMP/htdocs/sites-store/word/word2.php on line 7

Well this is my code below, I don't understand why it failed to open my dir when it's being declared below? Can someone help me with this.

Code of my word2.php

$numargs = count($argv);
if ($numargs > 1) {

    $folder = $argv[1];
    echo "Folder is: " . $folder . "\n";
    $files = array_diff(scandir($folder), array('.', '..')); //line 6
    foreach ($files as $file) { //line 7
        $filename = str_replace("í»", "", $filename);
    }
} else {
    echo "You need to pass the folder absolute path";
    exit();
}

Code for running my script using this command ./run.bat this is the filename with a code below.

php word2.php "/Applications/MAMP/htdocs/sites-store/word/images"

PAUSE