0) { $a = $b; $b = $r; $r = $a % $b; } return $b; } function simplify($num,$den) { $g = gcd($num,$den); return Array($num/$g,$den/$g); } function get_title($width, $height) { $title = $width . "x" . $height; $ratio = simplify($width, $height); if ($ratio[0] != 16 && $ratio[1] != 9) { if ($ratio[0] == 64 && $ratio[1] == 27) { // 64:27 is the true ratio, but 21:9 is the common approximation $title = $title . " (21:9)"; } else if ($ratio[0] == 8 && $ratio[1] == 5) { // common sense $title = $title . " (16:10)"; } else { $title = $title . " (" . $ratio[0] .":". $ratio[1] . ")"; } } return $title; } ?>