Problema assurdo con function e between

[oly1982]

function rating_piccoli( $string )
{
if ($string > 0 && $string <=50) { $string = "160px"; }
else if ($string > 50 && $string <=150) { $string = "140px"; }
else if ($string > 150 && $string <=200) { $string = "120px"; }
else if ($string > 200 && $string <=300) { $string = "100px"; }
else if ($string > 300 && $string <=500) { $string = "80px"; }
else if ($string > 500 && $string <=1000) { $string = "60px"; }
else if ($string > 1000 && $string <=1500) { $string = "40px"; }
else if ($string > 1500) { $string = "20px"; }
   return $string;
}

$ciccio = 1;
echo rating_piccoli($ciccio);
exit;