PHP 使用QR code库生成带LOGO图像的二维码

<?phpinclude ('phpqrcode.php');$value = 'http://www.codesc.net';//二维码数据$errorCorrectionLevel = 'L';//纠错级别：L、M、Q、H$matrixPointSize = 10;//二维码点的大小：1到10QRcode::png ( $value, 'ewm.png', $errorCorrectionLevel, $matrixPointSize, 2 );//不带Logo二维码的文件名echo "二维码已生成" . "<br />";$logo = 'emwlogo.gif';//需要显示在二维码中的Logo图像$QR = 'ewm.png';if ($logo !== FALSE) {    $QR = imagecreatefromstring ( file_get_contents ( $QR ) );    $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 );}imagepng ( $QR, 'ewmlogo.png' );//带Logo二维码的文件名?>