How to call functions in thinkphp

ThinkPHP is a PHP development framework that provides a fast, simple, efficient and high-quality development system for common WEB applications. Generally speaking, in the process of developing a WEB application, we will use some methods or functions many times. In the ThinkPHP framework, how to call functions? This article will introduce you one by one.

1. Global functions

ThinkPHP framework allows calling PHP global functions. For example, here are some common PHP global functions.

$pos = strpos("hello world", "world");
echo $pos;

This is one of the very common functions in PHP - strpos(). This can also be called under the ThinkPHP framework.

$pos = strpos("hello world", "world");
echo $pos;

You can see that when we use these global functions in a controller or template file, there is no difference from normal PHP operations.

2. Assistant functions

Assistant functions are very common techniques in the ThinkPHP framework. They are some simple and practical functions integrated inside the system for developers to call at any time in the program. . ThinkPHP's helper functions are often prefixed with tp_, which makes it easier for us to distinguish them in the code. For example, we often use the tp_log() function.

tp_log('你好啊');

It is easy to call a helper function, just call it directly where needed.

3. Using namespaces

The ThinkPHP framework makes extensive use of the concept of namespaces to help us better manage files and functions. Therefore, using namespaces is also a good choice when using frameworks. For example, we can create a new class in the controller directory, reference a certain namespace, and then call the functions in it.

namespace appcontroller;

use thinkController;

class Index extends Controller
{
    public function index()
    {
        $pos = strpos("hello world", "world");
        echo $pos;
    }
}

We introduce the thinkController namespace into the newly created class and call the strpos() function. This method is also one of the common ways to call functions.

The above are several methods of calling functions under the ThinkPHP framework. I hope this article can be helpful to your development work.

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