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  1. <?php
  2.  
  3. class Foo
  4. {
  5.     const NAME = 'Foo';
  6.  
  7.     //Always Foo::NAME (Foo) due to self
  8.     protected static $staticName = self::NAME;
  9.  
  10.     public function __construct()
  11.     {
  12.         echo $this::NAME;
  13.     }
  14.  
  15.     public function getStaticName()
  16.     {
  17.        echo $this::$staticName;
  18.     }
  19. }
  20.  
  21. class Bar extends Foo
  22. {
  23.     const NAME = 'FooBar';
  24.  
  25.     /**
  26.      * override getStaticName to output Bar::NAME
  27.      */
  28.     public function getStaticName()
  29.     {
  30.         $this::$staticName = $this::NAME;
  31.         parent::getStaticName();
  32.     }
  33. }
  34.  
  35. $foo = new Foo; //outputs Foo
  36. echo PHP_EOL;
  37. $bar = new Bar; //outputs FooBar
  38. echo PHP_EOL;
  39. $foo->getStaticName(); //outputs Foo
  40. echo PHP_EOL;
  41. $bar->getStaticName(); //outputs FooBar
  42. echo PHP_EOL;
  43. $foo->getStaticName(); //outputs FooBar
Success #stdin #stdout 0.04s 52480KB
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Foo
FooBar
Foo
FooBar
FooBar
https://ideone.com/7etRHy
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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