php调用google接口生成二维码实例

例子，调用google接口来实现二维码。

?php
$data = isset($_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
//以下是二维码生成的主要代码
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);
//销毁二维码图像
imagedestroy($QR);
?>