How to get canceled constants in ThinkPHP5 framework

With the continuous development of PHP technology, more and more developers are beginning to use the ThinkPHP5 framework for project development. During use, we may encounter some problems, such as how to obtain the constants canceled in the ThinkPHP5 framework. This article explains how to get the desired value through other methods.

1. Understand the constants canceled by ThinkPHP5

In previous versions, there were many constants in the ThinkPHP framework that could be used directly, such as ROOT_PATH, APP_PATH, NOW_TIME, etc. But in ThinkPHP5, these constants have been cancelled, and other methods are used to obtain these values.

2. Obtain ROOT_PATH

In the ThinkPHP5 framework, obtain the directory where the current file is located through __DIR__, and then obtain the upper-level directory of the directory through the dirname() function, which is the root The path to the directory. The code is as follows:

define('ROOT_PATH', dirname(__DIR__));

3. Get APP_PATH

Similarly, we can get the directory where the current file is located through __DIR__, and then get the two directories above the directory through the dirname() function , which is the path to the application root directory. The code is as follows:

define('APP_PATH', dirname(dirname(__DIR__)));

4. Get the timestamp

In the ThinkPHP5 framework, we can get the timestamp of the current time through the time() function. The code is as follows:

$timestamp = time();

But we can also format it into the string format we want through PHP's date() function. For example:

$dateStr = date('Y-m-d H:i:s', $timestamp);

Here the timestamp is formatted in the format of "Year-Month-Day Hour:Minute:Second".

5. Obtain other constants

In the ThinkPHP5 framework, many constants have been cancelled. If we need to use the values ​​​​in them, we can do so in other ways. For example:

1. Use system constants: PHP_EOL (newline character), DIRECTORY_SEPARATOR (directory separator), etc.
2. Define constants in the config file: We can define constants in the config.php file in the config directory, and then get their values ​​through the constant name in other places that need to be used.

6. Summary

This article introduces how to obtain constants canceled in the ThinkPHP5 framework through other methods. This requires developers to have a certain understanding and mastery of PHP's basic syntax and framework usage. I hope this article can help developers who need to understand this issue.

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