What is the method of calling file class in php

This time I will show you how to make a calling file class in PHP, and what are the precautions for making a calling file class in PHP. The following is a practical case, let's take a look.

Related recommendations: "PHP Tutorial"

First declare a class in a tool.php file:

      
In another file main. PHP calls the method in the above class:
      
say(); echo $content; ?>
      
The above is the detailed content of What is the method of calling file class in php. For more information, please follow other related articles on the PHP Chinese website!