function getImages($folder){
	
	$basedir = "/home/cochipp/public_html/"; // base directory for the server
	
	$localdir = "images/banners/".$folder."/"; // local directory and the folder passed
	$dirname = $basedir.$localdir;
	
	$dir = opendir($dirname);
	
	$images_arr = array();
	$images = "";
	$i = 0;
	
	while(false != ($file = readdir($dir))){
		if(($file != ".") and ($file != "..") and ($file != "index.html")){
			$images_arr[$i] = '{ src: "/'.$localdir.$file.'" },';
			$i++;
		}
	}
	
	shuffle($images_arr);
	
	foreach($images_arr as $image){
		$images .= $image;	
	}
	
	// strip off last comma
	$images = substr($images, 0, -1);
	
	echo $images;

}

Returns all the images in a folder randomly.Listed back in this format: { src: "/'.$localdir.$file.'" },

function: getImages($folder)

PHP