header

header('Content-type: image/png');
header('Content-Disposition: attachment; filename="index.png"');
readfile('http://beijingmarathon2015.hupu.com/frontSource/beijingMarathon2015/images/index.png');

http://php.net/manual/zh/func...

http://php.net/manual/zh/func...

ox16进制

        header("Content-type: image/jpeg");
        $im = imagecreatefrompng("http://baidu.com/images/bg-beer.png");
        $textcolor = imagecolorallocate($im,0,0,0);
        $font = "/fonts/simhei.ttf";
        $text='12345';
        $text = mb_convert_encoding($text,"html-entities", "utf-8");
        imagettftext($im,10,0,200,200,$textcolor,$font,$text);
        imagepng($im);