搜狗浏览器高速不显示，兼容乱码.解决思路

header("content-type:image/png");
?>




$num_image = imagecreate(200,60);
imagecolorallocate($num_image,120,2,55);
$color = imagecolorallocate($num_image,22,55,66);
imagestring($num_image,50,100,40,111,$color);
imagepng($num_image);
?>