PHP keyword This points to the current object pointer _php tutorial

2. < ? PHP
4. Class UserName
6. {
8. Defining properties
10. Private $name;
12. Defining constructors
14. function __construct ($name)
16. {
18. $this- > name = $name;
    The this pointer is already used here
20. }
22. Destructors
24. function __destruct () {}
26. Print User name member function
28. function Printname ()
30. {
32. Print ($this->name);
    and using the PHP keyword this pointer
34. }
36. }
38. Instantiating an Object
40. $ Nameobject = New UserName
    ("Heiyeluren");
42. Perform printing
44. $nameObject- > Printname ();
    Output: Heiyeluren
46. Second instantiation of the object
48. $ NameObject2 = New UserName ("PHP5");
50. Perform printing
52. $nameObject 2- > printname ();//output: PHP5
54. ?>

Let's see, the class above uses the this pointer in 11 rows and 20 rows, so who is this at that point? In fact this is at the time of instantiation to determine who to point to, such as when the first instantiation of the object (25 rows), then this is pointing to the $nameobject object, then the execution of 18 lines of printing when the print ($this , name), Then of course the output is "Heiyeluren".

In the second instance, print ($this->name) becomes print ($nameObject 2->name), so it outputs "PHP5". So the PHP keyword this is a pointer to the current object instance and does not point to any other object or class.

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