Analysis of the functions and usage of widgets in thinkPHP5 framework-PHP Tutorial-php.cn

Analysis of the functions and usage of widgets in thinkPHP5 framework

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Release： 2023-03-31 12:32:01

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This article mainly introduces the functions and usage of widgets in the thinkPHP5 framework, and analyzes related concepts, usage methods and operating precautions of widgets in thinkPHP5 in the form of examples. Friends in need can refer to the examples in this article

Describes the functions and usage of widgets in the thinkPHP5 framework. Share it with everyone for your reference, the details are as follows:

Note: Use the assistant function return view() to render, the widget function will fail , must use return $this->fetch()

When we use templates, the top of the general website (such as the navigation bar, or user login area, etc.), and The footer at the end of the website (such as friendly links or copyright notices, etc.) and the body area, in order to simplify the code, we will separate these three parts, and then use them through template inheritance.

But if the top and tail are just pure html code, it's okay, but there are usually logic such as variable assignment, loop traversal, and judgment.

Of course, the original method is that we use native php code in these two areas To implement, but this is not in line with the concept of thinkphp5 framework, so there is widget in the early version. Those who are familiar with WordPress and Yii framework are very familiar with it. These are all built into pendants and widgets.

It is very convenient for you to set output including variable loops in a certain area of the website, such as advertising module, calendar module, etc.

The following will introduce how to set up output in thinkphp5 Simply use this function.

First we need to create a Blog controller in the module directory and resume widget directory, and then write the following code in the index method ; This depends on your habits of using the framework. Of course, if you do not inherit, you need to use the view assistant to render the template.

The meaning of the code is to take out the data in the model Book and assign it to the template.

Key point: $this->fetch(); Don’t think that if you don’t write the template path in it, it will default to only the index view in the blog folder under the view view,

This is not possible in widgets, you must fill in the corresponding view path

The corresponding view path is index.html in the blog directory under the view view, of course you can customize the view name

namespace app\index\widget;
use app\index\model\Book;
use think\Controller;
class Blog extends Controller
{
  public function index()
  {
    $list = Book::all();
    $this->assign(&#39;list&#39;,$list);
    return $this->fetch(&#39;widget/index&#39;);
  }
}

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Then the code in

view/blog/index.html

is as follows, for example only

Here the customized output traverses the specified content

{volist name="list" id="v"}
<p>{$v.id}+{$v.bookname}</p>
{/volist}

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You can use any functions you want in actual applications, such as navigation bar traversal Output, or how to call many many widget modules

, you can use the following in your specified view template or in an inherited public template

{:widget('Blog /index')}

This way to output, Blog is the controller in the widget directory, index is the method name in the controller

<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport"
     content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>
  <p>这里显示的默认主页输出内容</p>
  <p>如果widget使用正常,下面将输出遍历一个数据表的内容</p>
  {:widget(&#39;Blog/index&#39;)}
</body>
</html>

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At this point, the output of the following page is completed!

The default homepage output content shown here

If the widget is used normally, the following will output the content of traversing a data table

1 weilai

2 yanyan

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