心血来潮，写了个圆形印章生成器，字体的弧形旋转颇费功夫。总算效果还不错，代码存档。

@$hos=iconv("GBK", "UTF-8", $_GET["hos"]);

if(!isset($hos))

exit;

$im=ImageCreate(150,150);

$gray=ImageColorResolveAlpha($im,200,200,200,127);

$red=ImageColorAllocate($im,230,150,150);

for($i=0;$i<6;$i++)

ImageArc($im,75,75,148-$i,148-$i,0,360,$red);

$stock='C:\WINDOWS\Fonts\simkai.ttf';

$point="★";

$size=30;

ImageTTFText($im,$size,0,72-$size/2,72+$size/2,$red,$stock,$point);

$a=75;$b=-75;//中心点坐标

$r=65;$m=40;//半径，角度

$size=16;//字体大小

$r=$r-$size;

$word=array();

$max=18;

$count=mb_strlen($hos,'utf8');

if($count>$max)$count=$max;

if($count>12)

$m=floor(360/$count);

else if($count>5)

$m-=$count;

for($i=0;$i

$word[]=mb_substr($hos,$i,1,'utf8');

$j=floor($count/2);

if($j!=$count/2)

{

for($i=$j;$i>=0;$i--)

{

$arc=$m*($j-$i)+$size/2;

$x=round($r*cos((90+$arc)*M_PI/180))+$a;

$y=-1*(round($r*sin((90+$arc)*M_PI/180))+$b);

if($arc<10)$arc=0;

ImageTTFText($im,$size,$arc,$x,$y,$red,$stock,$word[$i]);

$arc=$m*($j-$i)-$size/2;

$x=round($r*cos((90-$arc)*M_PI/180))+$a;

$y=-1*(round($r*sin((90-$arc)*M_PI/180))+$b);

if($arc<10)$arc=0;

ImageTTFText($im,$size,-$arc,$x,$y,$red,$stock,$word[$j+$j-$i]);

}

}

else

{

$j=$j-1;

for($i=$j;$i>=0;$i--)

{

$arc=$m/2+$m*($j-$i)+$size/2;

$x=round($r*cos((90+$arc)*M_PI/180))+$a;

$y=-1*(round($r*sin((90+$arc)*M_PI/180))+$b);

ImageTTFText($im,$size,$arc,$x,$y,$red,$stock,$word[$i]);

$arc=$m/2+$m*($j-$i)-$size/2;

$x=round($r*cos((90-$arc)*M_PI/180))+$a;

$y=-1*(round($r*sin((90-$arc)*M_PI/180))+$b);

ImageTTFText($im,$size,-$arc,$x,$y,$red,$stock,$word[$j+$j+1-$i]);

}

}

header('Content-Type:image/png');

ImagePNG($im);

?>