How to use ThinkPHP template custom tags_PHP tutorial-PHP Tutorial-php.cn

How to use ThinkPHP template custom tags_PHP tutorial

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Release： 2016-07-13 10:26:15

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Using template tags can make website front-end development faster and simpler. Anyone who has used content management systems such as dedecms and phpcms should know that the front-end of cms uses template tags to call data. Take calling the article list as an example:

dedecms can be written as:

<ul>
{dede:arclist row='10' orderby='id desc' titlelen=''}
     <li>[field:title]</li>
{/dede:arclist}
</ul>

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phpcms can be written as:

<ul>
{pc:content action="hits" catid="6" num="10" order="views DESC"}
   {loop $data $r}
    <li>{$r[title]}</li>
   {/loop}
{/pc}
</ul>

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ThinkPHP’s custom tags can also achieve such powerful functions. ThinkPHP custom tags are implemented through the TAG extension library. ThinkPHP itself comes with a tag extension library. As long as we inherit TagLib, we can define our own tags as we like.

Naming convention:

TagLib+tag library name.class.php

The following takes the implementation of calling navigation as an example to illustrate

The file TagLibNav.class.php is as follows:

<&#63;php
class TagLibNav extends TagLib {
  //attr 属性列表 
  //close 是否闭合（0 或者1 默认1）
  //alias 标签别名
  //level 嵌套层次
  // 标签定义如下：
  protected $tags = array(
    'nav' => array('attr' => 'limit,order', 'level' => 3,'close'=>1),
  );
  //定义查询数据库标签
  //attr是属性列表，$content是存储标签之间的内容的
  public function _nav($attr, $content) {
    $tag=$this->parseXmlAttr($attr,$content);
    $cate=M('Channel');
    $tb=$cate->order($tag['order'])->limit($tag['limit'])->select();
    $str='';
    for($i=0;$i<count($tb);$i++)
    {
     $c=str_replace(array("[filed:id]","[filed:name]"),array($tb[$i]['id'],$tb[$i]['name']),$content);
     $str.=$c;
    }
    return $str;
  }
}
&#63;>

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HTML page calling method:

<tagLib name="nav" />     //必须在头部进行引用否则会出错
<html>
<head>
 <title>tablist</title>
</head>
<body>
  <div class="nav">
   <ul>
    <li>首页</li>
    <nav:nav limit='4' order='id asc'>
     <li><a href="[filed:id]">[filed:name]</a></li>
    </nav:nav>
   </ul>
 </div>
 </body>
</html>

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Configuration file:

'APP_AUTOLOAD_PATH'=>'@.TagLib',  //TagLib的位置  @.表示当前文件夹下
'TAGLIB_BUILD_IN'=>'Cx,Nav',       //Cx是thinkphp基础类库的名称必须引用否则volist等标签就无法使用，Nav是自己定义的标签名称

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Controller:

<&#63;php
class IndexAction extends Action{
  public function index() {
    $this->display();
  }
}
&#63;>

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Custom tags are now implemented, and there is no need to write a lot of code in the controller.