PHP Singleton mode code

Source: Internet
Author: User
PHP Singleton mode code

  1. Class User {
  2. Static function getInstance ()
  3. {
  4. If (self: $ instance = NULL) {// If instance is not created yet, will create it.
  5. Self: $ instance = new User ();
  6. }
  7. Return self: $ instance;
  8. }
  9. Private function _ construct ()
  10. // Constructor method as private so by mistake developer not crate
  11. // Second object of the User class with the use of new operator
  12. {
  13. }
  14. Private function _ clone ()
  15. // Clone method as private so by mistake developer not crate
  16. // Second object of the User class with the use of clone.
  17. {
  18. }
  19. Function Log ($ str)
  20. {
  21. Echo $ str;
  22. }
  23. Static private $ instance = NULL;
  24. }
  25. User: getInstance ()-> Log ("Welcome User ");


PHP

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