How to use custom tags in ThinkPHP6

With the development of Internet technology, the complexity of Web applications continues to increase, requiring a more flexible and efficient development framework to cope with it. As an excellent PHP development framework, ThinkPHP has become one of the preferred frameworks for web applications of all sizes.

In ThinkPHP6, custom tags are a very useful feature that can help us complete some common functions and improve application development efficiency. This article will introduce how to use custom tags in ThinkPHP6.

1. What is a custom tag

In ThinkPHP6, a custom tag refers to a piece of PHP code that can be referenced in the template file through a custom tag to help us complete some common tasks Functions, such as generating links, reading databases, etc.

The advantage of using custom tags is that you can encapsulate some repetitive operations, reduce code redundancy, and improve code reusability and maintainability.

2. The syntax of custom tags

In ThinkPHP6, the syntax format of custom tags is:

{:tag(param1="value1", param2="value2", …)} Code {:/tag}

where tag is the name of the custom tag, param1, param2, etc. are the parameters of the tag, value1, value2, etc. are the parameters value.

When using custom tags in templates, you need to use the format reference of {:tag(...) code :/tag} in the template.

3. Application scenarios of custom tags

In ThinkPHP6, custom tags can be applied to the following scenarios:

1. Generate links: they can be dynamic based on certain parameters Generate links, such as pagination links, product details links, etc.

2. Read the database: You can read data from the database according to the parameters of the custom tag and output it to the page.

3. Formatted output: The output content can be formatted according to certain rules, such as formatting the time into the form of year-month-day.

4. Call the external interface: You can call the external interface through custom tags to obtain data and output it to the page.

4. Implementation of custom tags

In ThinkPHP6, custom tags can be implemented by defining classes. The specific steps are as follows:

1. Create a custom tag class

First you need to create a CustomTagProvider.php file in the appprovider directory. This file is mainly used to define custom tag classes:

<?php

namespace appprovider;

use thinkacadeView;
use thinkacadeDb;

class CustomTagProvider
{
    // 定义分页标签
    public function page($page, $totalCount, $pageSize)
    {
        $totalPage = ceil($totalCount / $pageSize); // 计算总页数
        $prePage = $page - 1; // 上一页
        $nextPage = $page + 1; // 下一页
        $prePageUrl = $prePage > 0 ? sprintf('?page=%d', $prePage) : ''; // 上一页链接
        $nextPageUrl = $nextPage <= $totalPage ? sprintf('?page=%d', $nextPage) : ''; // 下一页链接

        // 返回分页HTML代码
        return sprintf('<ul class="pagination">
            <li class="page-item %s">
                <a class="page-link" href="%s">上一页</a>
            </li>
            <li class="page-item %s">
                <a class="page-link" href="%s">下一页</a>
            </li>
        </ul>',
            $prePageUrl ? '' : 'disabled',
            $prePageUrl,
            $nextPageUrl ? '' : 'disabled',
            $nextPageUrl
        );
    }

    // 定义商品详情链接标签
    public function showGoods($id)
    {
        $goods = Db::name('goods')->find($id); // 从数据库中读取数据
        // 返回商品详情链接
        return sprintf('<a href="%s">%s</a>', url('goods/detail', ['id' => $id]), $goods['name']);
    }
}

In the above code, we defined two custom tags The tags are page and showGoods respectively. Among them, the page tag is used to generate paging links, and the showGoods tag is used to generate product details links.

2. Define a custom label service

Create the MyServiceProvider.php file in the appprovider directory. This file is used to define a custom label service:

<?php

namespace appprovider;

use thinkacadeApp;
use thinkserviceServiceProvider;

class MyServiceProvider extends ServiceProvider
{
    public function register()
    {
        App::bind('CustomTag', CustomTagProvider::class);
    }
}

In the above code , we defined a CustomTag service, the service provider class is CustomTagProvider, and it is bound to the App container.

3. Register the custom label service

Register the custom label service in the config pp.php file:

<?php

return [
    // ...
    'providers' => [
        // ...
        ppproviderMyServiceProvider::class,
    ],
];

In the above code, we will use the MyServiceProvider service Registered in the providers array, and registered the CustomTagProvider custom tag class through the service.

4. Call custom tags

When using custom tags in templates, you can use class template calls, for example:

<!-- 生成分页链接 -->
$CustomTag->page($page, $totalCount, $pageSize)

<!-- 生成商品详情链接 -->
$CustomTag->showGoods($id)

When using custom tags, you need to Note that you need to add the ":" symbol when quoting in the template, for example:

<!-- 引用分页链接标签 -->
{: $CustomTag->page($page, $totalCount, $pageSize) :}

<!-- 引用商品详情链接标签 -->
{: $CustomTag->showGoods($id) :}

The above is the implementation method and application scenario of custom tags in ThinkPHP6. I hope it can help developers apply it more efficiently. Program development.

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