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GD2绘制图形在浏览器中不能展示

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Release： 2016-06-13 11:24:32
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GD2绘制图形在浏览器中不能显示
绘制了一个图形,如果是以ANSI格式编码可以在浏览器输出
但是以UTF-8格式编码就不能显示图形,这是什么原因?求指教!!!

代码如下:

<br /><?php<br />$im = imagecreatetruecolor(50,25);<br /><br />$red = imagecolorallocate($im,255,0,0);<br />$str = 'ABCDEFGHIJKMNPQRSTUVWXTZabcdefghijkmnpqrstuvwxtz23456789';<br />$str = substr(str_shuffle($str),0,4);<br />imagestring($im,5,8,5,$str,$red);<br /><br />header('content-type:image/png');<br />imagepng($im);<br />imagedestroy($im);<br /><br /><br />?><br />
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PHP GD2 浏览器 编码
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source：php.cn
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