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  1. <?php
  2. class A {
  3.   public static $foo = null;
  4.  
  5.   public function getClass() { return __CLASS__; }
  6.  
  7.     public static function printFoo() {
  8.       static::guessFoo();
  9.       print "Class: " . static::getClass() . ' says: ';
  10.       print static::$foo . "\n";
  11.     }
  12.  
  13.   public static function guessFoo() {
  14.     if(!static::$foo) {
  15.       static::$foo = ' I am ' . static::getClass();
  16.     }
  17.   }
  18. }
  19.  
  20. class B extends A {
  21.   public function getClass() { return __CLASS__; }
  22. }
  23.  
  24. class C extends A {
  25.   public function getClass() { return __CLASS__; }
  26. }
  27.  
  28.  
  29. A::printFoo();
  30. B::printFoo();
  31. C::printFoo();
  32.  
Success #stdin #stdout 0.01s 20568KB
comments (?)
stdin
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Standard input is empty
stdout
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Class: A says:  I am A
Class: B says:  I am A
Class: C says:  I am A
https://ideone.com/aVpKHn
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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