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  1. <?php
  2.  
  3. class A
  4. {
  5.     public function abc()
  6.     {
  7.         $a = '';
  8.         $a .= self::test();
  9.         $a .= static::test();
  10.         return $a;
  11.     }
  12.  
  13.     public static function test()
  14.     {
  15.         return 'A';
  16.     }
  17.  
  18.     public function __toString()
  19.     {
  20.         return get_class($this) . "\n";
  21.     }
  22.  
  23.     public static function createSelfObject()
  24.     {
  25.         return new self();
  26.     }
  27.  
  28.     public static function createStaticObject()
  29.     {
  30.         return new static();
  31.     }
  32. }
  33.  
  34. class B extends A
  35. {
  36.     public function abc()
  37.     {
  38.         return parent::abc() . "\n";
  39.     }
  40.  
  41.     public static function test()
  42.     {
  43.         return 'B';
  44.     }
  45. }
  46.  
  47. $a = new A();
  48. echo "Class A: ";
  49. echo $a->abc();
  50. echo "***\n";
  51.  
  52. $b = new B();
  53. echo "Class B: ";
  54. echo $b->abc();
  55. echo "***\n";
  56.  
  57. $a1 = A::createSelfObject();
  58. echo 'A::createSelfObject() -> ' . $a1;
  59. $a2 = A::createStaticObject();
  60. echo 'A::createStaticObject() -> ' . $a2;
  61. $b1 = B::createSelfObject();
  62. echo 'B::createSelfObject() -> ' . $b1;
  63. $b2 = B::createStaticObject();
  64. echo 'B::createStaticObject() -> ' . $b2;
  65.  
Success #stdin #stdout 0.03s 52480KB
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stdin
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Standard input is empty
stdout
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Class A: AA***
Class B: AB
***
A::createSelfObject() -> A
A::createStaticObject() -> A
B::createSelfObject() -> A
B::createStaticObject() -> B
https://ideone.com/kSHhvk
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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