Using Traits in Traits

Traits, like classes, can also use other traits. Let's look at an example. Suppose we have this trait with two methods:

Trait1.php<?php
  trait Trait1
  {
    private function method1()
    {
      return 1;
    }
    
    private function method2()
    {
      return 2;
    }
  }
?>

Suppose we also have another trait:

Trait2.php<?php
  trait Trait2
  {
    private function method3()
    {
      return 3;
    }
  }
?>

Let's connect the trait Trait1 to the trait Trait2:

Trait3.php<?php
  trait Trait2
  {
    use Trait1; // using the first trait
    
    private function method3()
    {
      return 3;
    }
  }
?>

After such a connection, it turns out that Trait2 will have not only its own methods but also the methods of the trait Trait1. Let's test this: create a class Test, connect the trait Trait2 to it, and make sure that our class will have methods from both the first trait and the second:

Test.php<?php
  class Test
  {
    use Trait2; // connecting the second trait
    
    public function __construct()
    {
      echo $this->method1(); // method of the first trait
      echo $this->method2(); // method of the first trait
      echo $this->method3(); // method of the second trait
    }
  }
?>