Alternative usage of classes-data encapsulation generally, if classname: property is used, the class attributes cannot be accessed, but classname: method () can be used () use the class method. Similarly, you cannot use objectname-& gt; property to access the variables in the method of the class. With this feature, we can encapsulate data in an alternative usage of some classes.
Generally, if you use classname: property, you cannot access the attributes of the class, but you can use classname: method () to use the class method. Similarly, you cannot use objectname-> property to access the variables in the class method. With this feature, we can save some data in the class, a bit like the private property of c ++.
Class data {
Function value ($ var ){
Static $ d = array ();
If (func_num_args ()> 1 ){
$ D [$ var] = func_get_arg (1 );
} Else {
Return $ d [$ var];
}
}
}
// Test:
Data: value ("a", 1 );
Data: value ("B", 2 );
Echo data: value ("");
Echo data: value ("B ");
?>
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.