$data=isset($_GET['t'])?$_GET['t']:'http://www.XXX.com';

$size=isset($_GET['size'])?$_GET['size']:'150x150';

$logo=isset($_GET['logo'])?$_GET['logo']:"./image/logo.jpg";

$chl=urlencode($logo);

$png="http://chart.googleapis.com/chart?chs=$size&cht=qr&chl=$chl&chld=L|1&choe=UTF-8";

$QR=imagecreatefrompng($png);//外面那QR图

if($logo!==FALSE){

$logo=imagecreatefromstring(file_get_contents($logo));

$QR_width=imagesx($QR);

$QR_height=imagesy($QR);

$logo_width=imagesx($logo);

$logo_height=imagesy($logo);

$logo_qr_width=$QR_width/5;

$scale=$logo_width/$logo_qr_width;

$logo_qr_height=$logo_height/$scale;

$from_width=($QR_width-$logo_qr_width)/2;

imagecopyresampled($QR,$logo,$from_width,$from_width,0,0,$logo_qr_width,$logo_qr_height,$logo_width,$logo_height);

}

header('Content-type:image/png');

imagepng($QR);

imagedestroy($QR);

?>

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