Trouble with function on Ubuntu server

Hello, I have this script that runs fine on my windows install but it is not running on my Ubuntu install. Heres the code

$root = $_SERVER['DOCUMENT_ROOT'];
$path = '/wordpress/...'; //correct Path being used

function getImagesFromDir($path) {
    $images = array();
    if ( $img_dir = @opendir($path) ) {
        while ( false !== ($img_file = readdir($img_dir)) ) {
            // checks for gif, jpg, png
            if ( preg_match("/(\.gif|\.jpg|\.png)$/", $img_file) ) {
                $images[] = $img_file;
            }
        }
        closedir($img_dir);
    }
    return $images;
}

function getRandomFromArray($ar) {
    $num = array_rand($ar);
    return $ar[$num];
}

// Obtain list of images from directory
$imgList = getImagesFromDir($root . $path);

then this to display

<div style="height: 50px; position: absolute; top: 84px; left: 66px;" class="cycle-slideshow2">
		<?php
		foreach ( $imgList as $img ) :
			$img = getRandomFromArray ( $imgList );
			?>
				<img src="<?php echo $path . $img ?>" width="27" height="27" />
 			<?php endforeach; ?>
	</div>

It does not seem to pull the $img out of the code and im not sure why.