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Introduction to the usage of php __call, __set and __get

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Release： 2016-07-25 08:59:47
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  2. class foo {
  3. function __call($name,$arguments) {
  4. print("Did you call me? I'm $name!
    ");
  5. print_r($ arguments);
  6. print("

    ");
  7. }
  9. function doSecond($arguments)
  10. {
  11. print("Right, $arguments!
    ");
  12. }
  13. }
  15. $test = new foo();
  16. $test->doFirst('no this function');
  17. $test->doSecond('this function exist');
  18. ?>
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__call implements the "overload" action This special method can be used to implement "overloading" actions, so that you can check your parameters and pass them by calling a private method.

Example: Use __call to implement "overload" action

  2. class Magic {
  3. function __call($name,$arguments) {
  4. if($name=='foo') {
  5. if(is_int($arguments[0])) $ this->foo_for_int($arguments[0]);
  6. if(is_string($arguments[0])) $this->foo_for_string($arguments[0]);
  7. }
  8. }
  10. private function foo_for_int($ x) {
  11. print("oh an int!");
  12. }
  13. //by bbs.it-home.org
  15. private function foo_for_string($x) {
  16. print("oh a string!");
  17. }
  18. }
  20. $test = new Magic();
  21. $test->foo(3);
  22. $test->foo("3");
  23. ?>
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2. Usage of __set and __get This is a great way to use the __set and __get methods to capture variables and methods that don't exist in an object. Example: __set and __get

  3. class foo {
  4. function __set($name,$val) {
  5. print("Hello, you tried to put $val in $name
    ");
  6. }
  8. function __get($name) {
  9. print("Hey you asked for $name
    ");
  10. }
  11. }
  13. $test = new foo();
  14. $test->__set('name',' justcoding');
  15. $test->__get('name');
  16. ?>
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In PHP programming, especially in PHP object-oriented programming, flexibly apply __call, __set and _ _get, you can receive unexpected surprises, it is recommended that everyone grasp it firmly.



Related labels：
php __call、__set 和 __get的用法介绍
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