学习 .Net 之后，再来看 PHP5

  以下代码用了接口，继承。 实现接口，调用静态方法等。仅供参考。

<?php
/**
* Package Desc
* Class
*
* Copyright (C)2007  Dennis
*/
/**
* @ClassName
* @Author
* @LastUpdate
*/
interface IEmployee
{
 function GetEmpInfo();
 function GetRolePermission();
 public static function GetEmpSeqNo();
}// end interface IEmployee

interface IPerson
{
 public function GetSex();
}

abstract class Student
{
 public abstract function GetEduBg();
}

class Employee implements IEmployee,IPerson
{
 private $empId;
 private $empName;
 private $empSex;

 function __construct($empid)
 {
  $this->empId = $empid;
 }

 public function EmpId()
 {
  return $this->empId;
 }// end

 public function EmpName()
 {
  return $this->empName;
 }

 function GetEmpInfo()
 {
  print "Get Employee Information<br/>";
 }// end

 function GetRolePermission()
 {
  print "get role permission()";
 }

 public static function GetEmpSeqNo()
 {
  echo "Get Emp Seq No <br/>";
 }// end

 function GetSex()
 {
  printf("sex ->{0}","MF");
 }
}// end class Employee()

class Manager extends Employee
{
 const SEX = 'M';
 public static $ss = 100;

 function __construct($empid)
 {
  parent::__construct($empid);
 }
 function GetManagerTitle()
 {
  print "  get manager title empployee id ->".$this->EmpId();
 }//
}// end class Manager()

$employee  = new Employee(100);
$employee->GetEmpInfo();

// call static function
Employee::GetEmpSeqNo();
Manager::GetEmpSeqNo();
// call none static function
print "<p> call none static function begin </p>";
Manager::GetEmpInfo();
print "<p> call none static function end </p>";

print Manager::SEX."<br/>";

$mgr = new Manager(200);
$mgr->GetEmpInfo();
$mgr->GetManagerTitle();
print Manager::$ss;

?>