A brief analysis of the relevant knowledge of path replacement in thinkphp

When using thinkphp, we often need to replace the path in order to better organize the code and implement functions. This article will introduce the relevant knowledge of path replacement in thinkphp and how to perform path replacement.

What is path replacement?

Path substitution refers to using some specific variables to replace the path in thinkphp, which is more convenient and flexible during development and debugging. Path replacement in thinkphp is mainly implemented through three variables, namely __APP__, __PUBLIC__ and __ROOT__.

__APP__ variable represents the root directory of the application, which is the directory where index.php is located. For example, by default, using __APP__ instead of the path can achieve the following path:

"/home/wwwroot/default/ThinkPHP/Application/"

The __PUBLIC__ variable represents the path to the public directory, that is, the public directory deployed to the root directory of the website. For example, you can use the following code to get the path to the public directory:

"/home/wwwroot/default/test/public/"

The __ROOT__ variable represents the root directory of the application, which is the directory where the entire application resides. For example, by default, using __ROOT__ instead of the path can achieve the following path:

"/home/wwwroot/default/ThinkPHP/"

How to perform path replacement

In thinkphp, you can use variables through the configuration file or directly in the code to perform path replacement.

Use configuration files for path replacement
In thinkphp, you can edit the config.php configuration file to perform path replacement. The specific steps are as follows:

1. Open config. php configuration file, find the following code:

   return array(
     // ...省略其他配置代码
     // 项目相关配置
     'TMPL_PARSE_STRING'  =>array(
      '__PUBLIC__' => '/public',// 更改默认的/Public 替换规则
      '__ROOT__' => '', // 更改默认的/ 替换规则
      '__APP__' => '/Application/', // 更改默认的/App 替换规则
     ),
     // ...省略其他配置代码
   );

2. Modify the corresponding values ​​​​of __PUBLIC__, __ROOT__, __APP__, for example, modify it to the following code:

   return array(
     // ...省略其他配置代码
     // 项目相关配置
     'TMPL_PARSE_STRING'  =>array(
      '__PUBLIC__' => '/static',// 将/Public替换为/static
      '__ROOT__' => '', // 根目录不变
      '__APP__' => '/app/', // 将/App替换为/app/
     ),
     // ...省略其他配置代码
   );

3. Save Modify and use __PUBLIC__, __ROOT__, __APP__ in the code for path replacement.

Perform path replacement directly in the code

In addition to performing path replacement in the configuration file, you can also use variables directly in the code to perform path replacement. Taking __PUBLIC__ as an example, you can use the following code for path replacement:

<?php
  // 在php文件中，可以使用变量__PUBLIC__来代替public目录的路径
  require __PUBLIC__ . &#39;/css/style.css&#39;;
 ?>

Summary

Path replacement is a very common function in thinkphp development, by using __APP__, __PUBLIC__, __ROOT__ and other specific variables, which can make management and calling paths more convenient and flexible. During the development process, pay attention to the relevant details of path replacement to avoid path errors and improve development efficiency and code quality.

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