prompt_logic.php

<?php

$fp = fopen('php://stdin', 'r');

echo "\nEnter the URL for the image file you want to flash [enter for default]:";

$url = chop(fgets($fp));

if(! $url)
{ 
    $url = "http://cm.northshoresoftware.com/funtaff/GENERIC.image";
    echo "\nUsing default: \"$url\"\n";
}

echo "$url\n";

?>