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:

<?php
  class tool {
  function say(){
  $result="Hello,World";
  return $result;
  }
}

In another file main. PHP calls the method in the above class:

<?php
  require_once &#39;tool.php&#39;;
  $tool=new tool();
  $content=$tool->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!