【www.gdgbn.com--php常用代码】

for ($y=0;$y<16;$y++)
{
echo "n";

for ($x=0;$x<16;$x++)
{
$abs00=sqrt(($x*$x)+($y*$y));
if ($abs00>16)
$abs00=16;

$abs01=sqrt(($x*$x)+((16-$y)*(16-$y)));
if ($abs01>16)
$abs01=16;

$abs10=sqrt(((16-$x)*(16-$x))+($y*$y));
if ($abs10>16)
$abs10=16;

$red=((16-$abs00)*16)-1;
if ($red<0)
$red=0;

$green=((16-$abs01)*16)-1;
if ($green<0)
$green=0;
$blue= ((16-$abs10)*16)-1;
if ($blue<0)
$blue=0;

$col = sprintf("%02x%02x%02x",$red,$green,$blue);
echo " ($red,$green,$blue=$col)n";
}

echo "n";
}
?>

php教程
echo "

本文来源：http://www.gdgbn.com/jiaocheng/24996/