PHP keyword this points to the current object pointer_PHP tutorial

1. < ?php
2. class UserName
3. {
4. //Define attributes
5. private $name;
6. //Define the constructor
7. function __construct( $name )
8. {
9. $this-> name = $name;
   //This pointer has been used here
10. }
11. //Destructor
12. function __destruct(){}
13. //Print username member function
14. function printName()
15. {
16. print( $this- >name );
    //The PHP keyword this pointer is used again
17. }
18. }
19. //Instantiated object
20. $nameObject = new UserName
    ( "heiyeluren" );
21. //Perform printing
22. $nameObject->printName();
    //Output: heiyeluren
23. //Second instantiation of the object
24. $nameObject2 = new UserName( "PHP5" );
25. // Execute printing
26. $nameObject2->printName(); //Output ：PHP5
27. ?>

Let’s see, the above class uses this pointer on lines 11 and 20 respectively, so who does this point to at that time? In fact, this determines who it points to when instantiating it. For example, when the object is instantiated for the first time (line 25), then this points to the $nameObject object. Then when printing on line 18, print( $this ->name ), then of course "heiyeluren" is output.

In the second instance, print( $this->name ) becomes print( $nameObject2->name ), so "PHP5" is output. Therefore, the PHP keyword this is a pointer to the current object instance and does not point to any other object or class.

http://www.bkjia.com/PHPjc/445969.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/445969.htmlTechArticle?php classUserName { //Define attributes private$name; //Define constructor function__construct($name) { $ this- name =$name; //This pointer has been used here} //Destructor function_...