PHP/Class/protected
Содержание
Class members" visibility
<source lang="html4strict">
public: can be accessed by any other code private: can be accessed only from within the same class. protected: may be accessed from within the class and from within any class that extends that class.
</source>
Class using access control
<source lang="html4strict">
class Person {
public $name;
protected $age;
private $salary;
public function __construct() {
}
protected function set_age() {
}
private function set_salary() {
}
}
</source>
Private and protected variables
<source lang="html4strict">
<?php class Staff {
private $name;
private $title;
protected $wage;
protected function clockIn() {
echo "Member $this->name clocked in at ".date("h:i:s");
}
protected function clockOut() {
echo "Member $this->name clocked out at ".date("h:i:s");
}
} ?>
</source>
Properties and methods marked as protected are accessible only through the object that owns them
<source lang="html4strict">
<?
class Dog {
public $Name;
private function getName( ) {
return $this->Name;
}
}
class Poodle extends Dog {
public function bark( ) {
print ""Woof", says " . $this->getName( );
}
}
$poppy = new Poodle;
$poppy->Name = "Poppy";
$poppy->bark( );
?>
</source>
protected member variable
<source lang="html4strict">
<?php
class Staff
{
protected $name;
protected $title;
function __construct()
{
echo "Staff constructor called!
"; }
}
class Manager extends Staff
{
function __construct()
{
parent::__construct();
echo "Manager constructor called!
";} } $employee = new Manager();
?>
</source>
