Home > Backend Development > PHP Tutorial > A PHP interview question about access control (access control to attributes or methods)_PHP tutorial

A PHP interview question about access control (access control to attributes or methods)_PHP tutorial

WBOY
Release: 2016-07-21 15:15:57
Original
903 people have browsed it

Copy code The code is as follows:

class Foo
{
private $name = 'hdj';
public function getName(){
return $this->name;
}
}
class Bar extends Foo
{
public $name = 'deeka';
}
$bar = new Bar;
var_dump($bar->name);
var_dump($bar->getName());


Access control

Access control on properties or methods is achieved by adding the keywords public, protected or private in front. Class members defined by public can be accessed from anywhere; class members defined by protected can be accessed by subclasses and parent classes of the class in which they are located (of course, the class in which the member is located can also be accessed); and by private The defined class members can only be accessed by the class in which they are located.

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/326011.htmlTechArticleCopy the code The code is as follows: class Foo { private $name = 'hdj'; public function getName(){ return $ this-name; } } class Bar extends Foo { public $name = 'deeka'; } $bar = new Bar; va...
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template