<!DOCTYPE html>
<html>
<head>
<title>test</title>
<meta http-equiv="Content-type" content="text/html">
</head>
<body>
hello
<?php
$image=imagecreatetruecolor(100,100);
$red=imagecolorallocate($image,0xff,0x00,0x00);
imagefill($image,0,0,$red);
header('Content-type:image/png');
imagepng($image);
imagedestroy($image);
?>
</body>
</html>


问题出在Content-type:image/png
用window的记事本编辑,源代码文件的编码utf8会有bom头、是不是这样,还需要验证、
