php生成二维码的插件phpqrcode

参考网址：

http://www.thinkphp.cn/topic/7749.html

http://blog.csdn.net/stxyc/article/details/44650971

php生成二维码的几种方式方法：http://blog.csdn.net/small_rice_/article/details/22922455

我用的是thinkphp框架

第一步：导入插件，把phpqrcode解压到thinkphp专门摆放第三方插件的地方，我这个项目的是ThinkPHP\Library\Vendor，官方的是：ThinkPHP/Extend/Vendor

第二步：在common/function.php公用函数中添加一个调用函数：

function qrcode($text=""){
    //include(realpath('D:\phpStudy\WWW\phpqrcode\qrlib.php'));
    //include(realpath('D:\phpStudy\WWW\phpqrcode\phpqrcode.php'));
    vendor("phpqrcode.phpqrcode");
     $data = $text;
     $filename =dirname( dirname(dirname( dirname( __FILE__ ) )) )."\Uploads\qrcode\z"
         .md5($data).".png";
     $errorCorrectionLevel = 'L';
     $matrixPointSize = 2;
     $margin = 5;
    // import("Common.Extend.phppqrcode",'phpqrcode','.php');
    QRcode::png($data, $filename, $errorCorrectionLevel, $matrixPointSize, $margin);
    return "/Uploads/qrcode/z".md5($data).".png";
}

第三步：在控制器函数用调用该公共函数

//生成二维码
        $text= "http://".I( 'server.HTTP_HOST' ).'/Home/Login/register?id='.$userData['ue_id'];
        $erweima=qrcode($text);
        $this->assign('erweima',$erweima);

第四步：在模板文件中调用

<img src="{$erweima}" alt="">

效果图：

aaarticlea/png;base64,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" alt="" />

注意的问题：

1.插件的引入一定要对，可以用include

2. $filename这个地址很重要，可能是物理地址。

3.return的地址和$filename有关联，写法又不一样。

出问题的话基本都是这三个地址没填好。