PHP制作生成中间加头像的二维码代码
QRCode码是由Denso公司于1994年9月研制的一种矩阵二维码符号,微信平台的火爆带动二维码在互联网行业的广泛应用。
最近皮皮精灵自媒体平台也为每篇文章提供二维码服务,用户扫一下文章对应的二维码,就可以在手机上预览文章内容,并且可以通过微信客户端分享自己的文章。而对二维码的应用我们还不仅仅是每篇文章,而是希望通过二维码更好的推广自媒体品牌,提升它的影响力。
在二维码中间加上用户的头像,是微信平台的做法,在查了相关的资料后,并没有这方面的介绍,不过通过不断的测试,快乐男孩也寻找到了解决这个问题的办法,下面给大家分享一下。
二维码生成的方法有许多人介绍php类库PHP QR Code,下载到最新版本:http://sourceforge.net/projects/phpqrcode/ 或 http://pan.baidu.com/s/1hqDrLgo。
解压后,只需要使用phpqrcode.php文件即可,程序代码如下:
public function qrcode($url ) { require_once FCPATH . 'application/third_party/phpqrcode.php'; QRcode::png($url); }
这样就可以生成二维码了,实际上在png这个方法里还有几个参数需要使用。
第一个参数$text,就是上面代码里的URL网址参数,
第二个参数$outfile默认为否,不生成文件,只将二维码图片返回,否则需要给出存放生成二维码图片的路径
第三个参数$level默认为L,这个参数可传递的值分别是 L(QR_ECLEVEL_L,7%),M(QR_ECLEVEL_M,15%),Q(QR_ECLEVEL_Q,25%),H(QR_ECLEVEL_H,30%)。 这个参数控制二维码容错率,不同的参数表示二维码可被覆盖的区域百分比。
利用二维维码的容错率,我们可以将头像放置在生成的二维码图片任何区域。
第四个参数$size,控制生成图片的大小,默认为4
第五个参数$margin,控制生成二维码的空白区域大小
第六个参数$saveandprint,保存二维码图片并显示出来,$outfile必须传递图片路径。
加头像的方式有两种,一种是修改phpqrcode.php这个文件,并在增加png这个方法中增加头像地址的参数,快乐男孩不建议这么做,以后 phpqrcode.php如果需要升级,会相当的不便,因此采用另一种方法,在调用png方法并返回图片后,再处理头像图片,将头像放在二维码图片上 面,这部分细节就不再详述了。

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