为dedecms增加二维码功能的实现代码
<p style='margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";'>dede增加二维码功能</p>
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<strong>1、打开/include/extend.func.php文件，在文件结尾添加以下内容</strong></p>
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</p>
<div class="msgheader" style='margin: 3px auto 0px; padding: 0px 3px; outline: none; line-height: 21.6px; clear: both; border-width: 1px; border-style: solid; border-color: rgb(0, 153, 204); background: rgb(246, 251, 255); overflow: hidden; font-family: tahoma, arial, "Microsoft YaHei";'>
<div class="right">
<span><u>复制代码</u></span>
</div>
代码如下:</div>
<div class="msgborder" id="phpcode1" style='margin: 0px auto 3px; padding: 0px 3px; outline: none; line-height: 25.2px; font-size: 14px; clear: both; border-right: 1px solid rgb(0, 153, 204); background: rgb(221, 237, 251); overflow: hidden; border-left: 1px solid rgb(0, 153, 204); word-break: break-all; border-bottom: 1px solid rgb(0, 153, 204); word-wrap: break-word; font-family: tahoma, arial, "Microsoft YaHei";'>
<br>
if ( ! function_exists('qr_code'))<br>
{<br><br>
function qr_code($aid,$widhtHeight ='150',$EC_level='L',$margin='0')<br>
{ <br>
$arr = GetOneArchive($aid);<br>
if($arr['arcurl']){<br>
$str = urlencode($arr['arcurl']);<br>
}else{<br>
$str = urlencode($GLOBALS['cfg_phpurl'].'/view.php?aid='.$aid);<br>
}<br>
return '<img src="http://chart.apis.google.com/chart?chs='.$widhtHeight.'x'.$widhtHeight.'&cht=qr&chld='.$EC_level.'|'.$margin.'&chl='.$str.'" alt="QR code" widhtHeight="'.$widhtHeight.'" widhtHeight="'.$widhtHeight.'"/>';<br>
}<br>
}</div>
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</p>
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<strong>2、在文章页模板调用，{dede:field.id function="qr_code(@me,200);"/}</strong></p>
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注：qr_code(@me,200) 200是二维码大小，可自行调整。<br><br>
至此，dede增加二维码功能完成，适用dede5.6及以上版本 <br><br><strong>google提供二维码生成器</strong> <br><br>
其实就是参考下面的传参方法 <br>
http://chart.apis.google.com/chart?cht=qr&chs=200x200&chl=https://www.jb51.net&amp;choe=UTF-8<br><br>
在后台系统-核心设置里“(是/否)支持多站点，开启此项后附件、栏目连接、arclist内容启用绝对网址：”这个下面设置为是 就可以开启绝对路径，生成出来的网址就没问题。</p>
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