How to use ThinkPHP template custom tags_PHP tutorial
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>
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>
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:
<?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;
}
}
?>
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>
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
Controller:
<?php
class IndexAction extends Action{
public function index() {
$this->display();
}
}
?>
Custom tags are now implemented, and there is no need to write a lot of code in the controller.
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