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Detailed explanation of the import method of thinkPHP2.1 custom tag library_php example
Detailed explanation of the import method of thinkPHP2.1 custom tag library_php example
This article details the import method of thinkPHP2.1 custom tag library. Share it with everyone for your reference, the details are as follows:
TP’s manual seems to be unable to keep up with the pace. It only has a few words about custom tags. After fumbling for a long time, I finally imported the custom tags. My thoughts are as follows:
1. Situation: Create a new custom tag library class: @.Mylib.Tag.TagLibTest — Those who understand TP should know the path represented by this
Use the Tag demo file under Examples
<?php
// +-----------------------------------------------------------
// | ThinkPHP
// +------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +------------------------------------------------------------
// | Author: liu21st <liu21st @gmail.com="">
// +------------------------------------------------------------
// $Id$
import('TagLib');
class TagLibArticle extends TagLib{
// 标签定义
protected $tags = array(
// 标签定义：
//attr 属性列表 close 是否闭合（0 或者1 默认1） alias 标签别名 level 嵌套层次
'article'=>array('attr'=>'name,field,limit,order,where,sql,key,mod','level'=>3),
);
//定义查询数据库标签
public function _article($attr,$content) {
$tag = $this->parseXmlAttr($attr,'article');
$result = !empty($tag['result'])?$tag['result']:'article'; //定义数据查询的结果存放变量
$key = !empty($tag['key'])?$tag['key']:'i';
$mod = isset($tag['mod'])?$tag['mod']:'2';
if ($tag['name'])
{ //根据用户输入的值拼接查询条件
$sql = "M('{$tag['name']}')->";
$sql .= ($tag['field'])?"field({$tag['field']})->":'';
$sql .= ($tag['order'])?"order({$tag['order']})->":'';
$sql .= ($tag['where'])?"where({$tag['where']})->":'';
$sql .= "select()";
}else{
if (!$tag['sql']) return ''; //排除没有指定model名称，也没有指定sql语句的情况
$sql .= "M()->query('{$tag['sql']}')";
}
//下面拼接输出语句
$parsestr = '<?php $_result='.$sql.'; if ($_result): $'.$key.'=0;';
$parsestr .= 'foreach($_result as $key=>$'.$result.'):';
$parsestr .= '++$'.$key.';$mod = ($'.$key.' % '.$mod.' );?>';
$parsestr .= $content;//解析在article标签中的内容
$parsestr .= '<?php endforeach; endif;?>';
return $parsestr;
}
}
?></liu21st>
Then create a new taglibs.php file in the Conf directory under the project, content:
<?php return array( 'article'=>'@.TagLib.TagLibarticle', ); ?>
This way you can use it in the template:
<tagLib name="article" />
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>ThinkPHP示例：自定义标签</title>
<link rel='stylesheet' type='text/css' href='__PUBLIC__/Css/common.css'>
</head>
<body>
<div class="main">
<h2>ThinkPHP示例之自定义标签：定义查询数据库的标签</h2>
本示例定义一个查询数据库的标签，可以使模板直接按条件查找指定的数据库并列表显示，本例仅是展示自定义标签的方便之处，可以进一步扩充和完善,打造属于自已的标签体系
<table cellpadding=2 cellspacing=2>
<thead>
<tr>
<td class="tLeft" width="8%">序列</td><td class="tLeft" width="12%">标题</td><td>内容</td>
</tr>
</thead>
<article:article name="form" limit="10">
<tr>
<td>{$article.id}</td>
<td>{$article.title}</td>
<td>{$article.content}</td>
</tr>
</article:article>
<tr>
<td colspan='3'>
<hr> 示例源码<br/>控制器自定义标签类<br/> <php>highlight_file(LIB_PATH.'TagLib/TagLibarticle.class.php');</php></td>
</tr>
</table>
</div>
</body>
</html>
This is a very simple situation, but my idea is to require the custom tag library to be automatically imported, so that there is no need to add tags like
Just encountered a little problem
2. Automatically import custom tag library
Add in the config.php file:
'TAGLIB_PRE_LOAD' => 'article' ,
Clear cache, prompt error "Instantiate a non-existent class!" ;
I searched around the TP official forum for a few times and found that there is only one way to solve it: import using aliases, that is, add the import path under commonn/alias.php in the TP framework:
For example:
There are also some solutions to modify the source code of the Template class, which are not easy to use — because usually I don’t want to modify the core for a small problem.
So I thought of the import of Action:
Add import into your project base class BaseAction.class.php:
function _initialize() {
import("@.Mylibs.Tag.TagLibArticle");
}
Refresh cache, problem solved...
This solution is simple and easy to use.
Added:
Using TP’s automatic loading configuration is faster:
'APP_AUTOLOAD_PATH'=> 'Think.Util.,@.Mylibs.Tag.',
Final plan:
1. Create Mylibs.Tag.TagLibTest — custom tag library
2. Configuration:
'APP_AUTOLOAD_PATH'=> 'Think.Util.,@.Mylibs.Tag.', 'TAGLIB_PRE_LOAD' => 'test' ,
You can use it normally after deleting the cache.
Readers who are interested in more thinkPHP related content can check out the special topics of this site: "ThinkPHP Getting Started Tutorial", "ThinkPHP Template Operation Skills Summary", "ThinkPHP Common Methods Summary", "Smarty Template Basic Tutorial" and "PHP Template Technology" Summarize".
I hope this article will be helpful to everyone’s PHP program design based on the ThinkPHP framework.
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