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PHP面向对象程序设计之对象生成方法详解
站长资源 2024/11/28 佚名
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DDR爱好者之家 Design By 杰米

本文实例讲述了PHP面向对象程序设计之对象生成方法。分享给大家供大家参考，具体如下：

对象

看个例子

<"{$this->name}: I'll clear my desk\n";
  }
}
class NastyBoss { // 坏老板
  private $employees = array();
  function addEmployee( $employeeName ) { // 添加员工
    $this->employees[] = new Minion( $employeeName ); // 代码灵活性受到限制
  }
  function projectFails() {
    if ( count( $this->employees ) > 0 ) {
      $emp = array_pop( $this->employees );
      $emp->fire(); // 炒鱿鱼
    }
  }
}
$boss = new NastyBoss();
$boss->addEmployee( "harry" );
$boss->addEmployee( "bob" );
$boss->addEmployee( "mary" );
$boss->projectFails();
// output:
// mary: I'll clear my desk
"htmlcode">



<"{$this->name}: I'll clear my desk\n";
  }
}
class NastyBoss {
  private $employees = array(); 
  function addEmployee( Employee $employee ) { // 传入对象
    $this->employees[] = $employee;
  }
  function projectFails() {
    if ( count( $this->employees ) ) {
      $emp = array_pop( $this->employees );
      $emp->fire();
    }
  }
}
// new Employee class...
class CluedUp extends Employee {
  function fire() {
    print "{$this->name}: I'll call my lawyer\n";
  }
}
$boss = new NastyBoss();
$boss->addEmployee( new Minion( "harry" ) ); // 直接以对象作为参数，更具有灵活性
$boss->addEmployee( new CluedUp( "bob" ) );
$boss->addEmployee( new Minion( "mary" ) );
$boss->projectFails();
$boss->projectFails();
$boss->projectFails();
// output:
// mary: I'll clear my desk
// bob: I'll call my lawyer
// harry: I'll clear my desk
"htmlcode">



<"name", "matt" );
unset( $pref ); // remove the reference
$pref2 = Preferences::getInstance();
print $pref2->getProperty( "name" ) ."\n"; // demonstrate value is not lost
"htmlcode">



<"Appointment data encoded in BloggsCal format\n";
  }
}
class MegaApptEncoder extends ApptEncoder {
  function encode() {
    return "Appointment data encoded in MegaCal format\n";
  }
}
class CommsManager { // 负责生产Bloggs对象
  function getApptEncoder() {
    return new BloggsApptEncoder();
  }
}
$obj = new CommsManager();
$bloggs = $obj->getApptEncoder(); // 获取对象
print $bloggs->encode();
"htmlcode">



<"Appointment data encoded in BloggsCal format\n";
  }
}
class MegaApptEncoder extends ApptEncoder {
  function encode() {
    return "Appointment data encoded in MegaCal format\n";
  }
}
class CommsManager {
  const BLOGGS = 1;
  const MEGA = 2;
  private $mode ;
  function __construct( $mode ) {
    $this->mode = $mode;
  }
  function getHeaderText() {
    switch ( $this->mode ) {
      case ( self::MEGA ):
        return "MegaCal header\n";
      default:
        return "BloggsCal header\n";
    }
  }
  function getApptEncoder() {
    switch ( $this->mode ) {
      case ( self::MEGA ):
        return new MegaApptEncoder();
      default:
        return new BloggsApptEncoder();
    }
  }
}
$man = new CommsManager( CommsManager::MEGA );
print ( get_class( $man->getApptEncoder() ) )."\n";
$man = new CommsManager( CommsManager::BLOGGS );
print ( get_class( $man->getApptEncoder() ) )."\n";
"htmlcode">



<"Appointment data encoded in BloggsCal format\n";
  }
}
class MegaApptEncoder extends ApptEncoder {
  function encode() {
    return "Appointment data encoded in MegaCal format\n";
  }
}
abstract class CommsManager { // 预约
  abstract function getHeaderText();
  abstract function getApptEncoder();
  abstract function getTtdEncoder();
  abstract function getContactEncoder();
  abstract function getFooterText();
}
class BloggsCommsManager extends CommsManager {
  function getHeaderText() {
    return "BloggsCal header\n";
  }
  function getApptEncoder() {
    return new BloggsApptEncoder();
  }
  function getTtdEncoder() {
    return new BloggsTtdEncoder();
  }
  function getContactEncoder() {
    return new BloggsContactEncoder();
  }
  function getFooterText() {
    return "BloggsCal footer\n";
  }
}
class MegaCommsManager extends CommsManager {
  function getHeaderText() {
    return "MegaCal header\n";
  }
  function getApptEncoder() {
    return new MegaApptEncoder();
  }
  function getTtdEncoder() {
    return new MegaTtdEncoder();
  }
  function getContactEncoder() {
    return new MegaContactEncoder();
  }
  function getFooterText() {
    return "MegaCal footer\n";
  }
}
$mgr = new MegaCommsManager();
print $mgr->getHeaderText();
print $mgr->getApptEncoder()->encode(); // 对象调用方法，返回对象，继续调用方法。
print $mgr->getFooterText();
"htmlcode">



<"Appointment data encoded in BloggsCal format\n";
  }
}
class MegaApptEncoder extends ApptEncoder {
  function encode() {
    return "Appointment data encoded in MegaCal format\n";
  }
}
abstract class CommsManager {
  const APPT  = 1;
  const TTD   = 2;
  const CONTACT = 3;
  abstract function getHeaderText();
  abstract function make( $flag_int ); // int标记
  abstract function getFooterText();
}
class BloggsCommsManager extends CommsManager {
  function getHeaderText() {
    return "BloggsCal header\n";
  }
  function make( $flag_int ) {
    switch ( $flag_int ) {
      case self::APPT: // self直接控制常量
        return new BloggsApptEncoder();
      case self::CONTACT:
        return new BloggsContactEncoder();
      case self::TTD:
        return new BloggsTtdEncoder();
    }
  }
  function getFooterText() {
    return "BloggsCal footer\n";
  }
}
$mgr = new BloggsCommsManager();
print $mgr->getHeaderText();
print $mgr->make( CommsManager::APPT )->encode();
print $mgr->getFooterText();
"htmlcode">



<"htmlcode">



EarthSea Object
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EarthPlains Object
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EarthForest Object
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更多关于PHP相关内容感兴趣的读者可查看本站专题：《php面向对象程序设计入门教程》、《PHP基本语法入门教程》、《PHP运算与运算符用法总结》、《PHP网络编程技巧总结》、《PHP数组(Array)操作技巧大全》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》


希望本文所述对大家PHP程序设计有所帮助。


                                

                                

                                     

                                
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