类扩展在include_once（）中不起作用

Question

My file structure is like this:

> main.php
   - file1.php
   - file2.php
   - file3.php

I have a class inside file1.php:

class ClassFileOne extends OtherClassInSameFile
{

}

that I would like to be used inside file2.php:

class ClassFileTwo extends ClassFileOne
{

}

However when I do this I get Error: Fatal error: Class 'ClassFileOne' not found in.

Is there a way to fix this?

Answer 1

At the top of file2.php, you need require_once('path/to/file1.php')

Using require instead of include will cause an error if file1 is not found, so you can easily see if your path is incorrect.