显示出来是乱码
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<?php
$image = imagecreatetruecolor(100 ,30 );
$bgcolor = imagecolorallocate($image,255,255,255);
header('content-type: image/png');
imagepng($image);
imagedestroy($image);
?>
<body>
</body>
</html>
