详解织梦DEDECMS自己动手添加一个函数实现模板中任意调用
<p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">是否遇到过想调用某些自定义字段，却发现dedecms的标签底层模板字段不包括这个字段呢？这就大大限制了灵活性，但dede也不可能让所有字段都允许调用的，那样就会大大降低系统效率，所以今天分享的是一个比较完美解决这个问题的方法，配合dede标签，几乎可以说没有什么不能调用的了。</p><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">
先上代码</p><div class="jb51code" style="margin: 0px; padding: 0px; outline: none; line-height: 25.2px; font-size: 14px; width: 660px; overflow: hidden; clear: both; font-family: tahoma, arial, "Microsoft YaHei";"><pre class="brush:js;">function table($table, $field, $id)
{
global $dsql;
$primarys = array();
$table = strpos($table, '#@_') === false?(strpos($table, 'dede_') ===false?''.$table:str_replace('dede_','',$table)):$table;
$dsql -> Execute("me","SHOW COLUMNS FROM `$table`");
while ($r = $dsql->GetArray())
{
if($r['Key'] == 'PRI') $primarys[] = $r['Field'];
}
if(!empty($primarys))
{
$primary = $primarys;
$result = $dsql -> GetOne("SELECT `$field` FROM `$table` WHERE `$primary`= $id");
}
return isset($result[$field])?$result[$field]:'';
}</pre></div><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">
首先把上面代码放到 include/extend.func.php 里，如果没有这个文件就自己建立一个（放到 ?> 前面哦）</p><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">
然后我们就可以在模板里任意使用了。</p><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">
使用方法：</p><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">
利用自定义函数对标签进行扩展</p><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">
如：</p><div class="jb51code" style="margin: 0px; padding: 0px; outline: none; line-height: 25.2px; font-size: 14px; width: 660px; overflow: hidden; clear: both; font-family: tahoma, arial, "Microsoft YaHei";"><pre class="brush:php;toolbar:false;">{dede:标记 function='table("要调用的表名","要调用的字段",@me)'/}</pre></div><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">
这里的“标记”就是要调用的表的主键的值，常见的就是id和aid、mid、uid之类的</p><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">
标签底层模板内</p><div class="jb51code" style="margin: 0px; padding: 0px; outline: none; line-height: 25.2px; font-size: 14px; width: 660px; overflow: hidden; clear: both; font-family: tahoma, arial, "Microsoft YaHei";"><pre class="brush:php;toolbar:false;"></pre></div><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";"><strong>举例</strong></p><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">
例如arclist标签底层模板字段是没有body字段的，就是说不能用arclist把文章内容调用出来的，当然这种需求很少，但不是没有，现在我们就可以这样使用 </p><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">
</p><div class="jb51code" style="margin: 0px; padding: 0px; outline: none; line-height: 25.2px; font-size: 14px; width: 660px; overflow: hidden; clear: both; font-family: tahoma, arial, "Microsoft YaHei";"><pre class="brush:php;toolbar:false;">{dede:arclist row='10' titlelen='24'}
{/dede:arclist}</pre></div><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">
还有很多作用，如type标签调用栏目简介，等等，自己去挖掘吧。</p><p style="margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";">
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。</p>
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