QUIZGUM

Coding Class

Quizgum : trait abstract

Assigning Rules to Traits

You can specify a method that must be declared in the class that uses the trait.
Same thing with the abstract keyword.

How To Use abstract for trait methods

  1. trait traitname{
  2.     abstract access modifier function method name();
  3. }

So let's look at an example.

  1. <?php
  2.     trait apple
  3.     {
  4.         // must declare likeApple() method
  5.         abstract static function likeApple();
  6.  
  7.         public static function phone()
  8.         {
  9.             return 'iPhone';
  10.         }
  11.     }
  12.  
  13.     class disney
  14.     {
  15.         use apple;
  16.     }
  17.  
  18.     $disney = new disney;
  19. ?>

Result

The error occurs because you do not declare the likeApple method in the disney class. The following example declares the likeApple() method.

  1. <?php
  2.     trait apple
  3.     {
  4.         //must declare likeApple() method
  5.         abstract static function likeApple();
  6.  
  7.         public static function phone()
  8.         {
  9.             return 'iPhone';
  10.         }
  11.     }
  12.  
  13.     class disney
  14.     {
  15.         use apple;
  16.  
  17.         public function likeApple()
  18.         {
  19.             return 'Disney and Apple are friendly.';
  20.         }
  21.     }
  22.  
  23.     $disney = new disney;
  24.     echo $disney->likeApple();
  25. ?>

Result

We have seen how to use this abstract to create method rules in a trait. ^-^ *