How to use variables from another file in php?

You can use the design namespace 's (php 7+)

Example :

The first option :

Let there be a file ex1.php :

<?php namespace example; class Ex{ public static $variable = 'Jack Sparrow'; } 

And the file ex2.php , in which you need to use a variable from the class Ex $ variable :

 <?php include 'ex1.php'; //или любой другой оператор подключения файлов php (include_once, require, require_once) use example as ex; echo ex\Ex::$variable; //выведет Jack Sparrow /* или use example\Ex; echo Ex::$variable; */ 

Yes, you need to connect the file anyway ( include operator).

This approach is more preferable from the point of view of the PLO and more convenient in the case of large projects.

In projects with an MVC structure, for example, here , you will not need to include such files in models (they are automatically connected in the Route class. And yes, that article was written in 2012, without using namespaces , but if you wish, you can easily add, it will be especially convenient if your project grows).

The second option :

Let there be a file ex1.php :

 <?php $variable = 'Test'; function doSomething($z){ echo $z; } 

And the ex2.php file:

 <?php require 'ex1.php'; echo $variable; //Получим Test doSomething('Привет, русскоязычный Stackoverflow!'); //выведет надпись в кавычках 

Variable and method from the file ex1.php , but by connecting it, we get access to them.

It is important to note that you need to attach files before using them in a third-party file.

This second example is suitable for small projects, or some small script.