#### if $url entered, find size ####
if ( isset($url) )
{
echo "Click image below for coordinates and colors.\n";
list($width, $height, $type, $attr) = getimagesize("$url");
$string = file_get_contents($url);
$length = strlen($string);
echo "";
echo "
";
echo "";
}
#### if no url entered, show prompt ####
if ( !isset($url) )
{echo "no image loaded";}
?>
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