PHP生成二维码的2种形式

<?php $urlToEncode="http://gz.altmi.com"; generateQRfromGoogle($urlToEncode); function generateQRfromGoogle($chl,$widhtHeight ='150',$EC_level='L',$margin='0') {     $url = urlencode($url);      echo '<img src="http://chart.apis.google.com/chart?chs='.$widhtHeight.'x'.$widhtHeight.'&cht=qr&chld='.$EC_level.'|'.$margin.'&chl='.$chl.'" alt="QR code"widhtHeight="'.$size.'" widhtHeight="'.$size.'"/>'; }?>

<?php include('./phpqrcode/phpqrcode.php');    // 二维码数据    $data = 'http://gz.altmi.com';    // 生成的文件名    $filename = $errorCorrectionLevel.'|'.$matrixPointSize.'.png';    // 纠错级别：L、M、Q、H    $errorCorrectionLevel = 'L';     // 点的大小：1到10    $matrixPointSize = 4;     QRcode::png($data, $filename, $errorCorrectionLevel, $matrixPointSize, 2); ?>

官方给出的用例：<?php # include这两个文件之一：/*qrlib.php for full version (also you have to provide all library files form package plus cache dir)OR phpqrcode.php for merged version (only one file, but slower and less accurate code because disabled cacheand quicker masking configured)*/# 两句话解释：# 包含qrlib.php的话需要同其它文件放到一起：文件、文件夹。# phpqrcode.php是合并后版本，只需要包含这个文件，但生成的图片速度慢而且不太准确# 以下给出两种用法：# 创建一个二维码文件QRcode::png('code data text', 'filename.png');// creates file# 生成图片到浏览器QRcode::png('some othertext 1234');// creates code image and outputs it directly into browser