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 ( ) EarthPlains Object ( ) EarthForest Object ( )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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3月20日消息,近期博主@数码闲聊站 透露,原定三月份发布的华为新旗舰P70系列延期发布,预计4月份上市。
而博主@定焦数码 爆料,华为的P70系列在定位上已经超过了Mate60,成为了重要的旗舰系列之一。它肩负着重返影像领域顶尖的使命。那么这次P70会带来哪些令人惊艳的创新呢?
根据目前爆料的消息来看,华为P70系列将推出三个版本,其中P70和P70 Pro采用了三角形的摄像头模组设计,而P70 Art则采用了与上一代P60 Art相似的不规则形状设计。这样的外观是否好看见仁见智,但辨识度绝对拉满。
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