PHP面向?qū)ο蟪绦蛟O(shè)計之類與反射API詳解

1、php面向?qū)ο蟪绦蛟O(shè)計之類與反射api詳解這篇文章主要介紹了 php面向?qū)ο蟪绦蛟O(shè)計之類與反射api,結(jié)合實例形式較為詳細(xì)的分析 了類的驗證、檢查、傳參及反射api等概念與操作技巧，需要的朋友可以參考下本文實例講述了 php面向?qū)ο蟪绦蛟O(shè)計之類與反射apl分享給大家供大家參考，具體如下:了解類class_exists驗證類是否存在<?php/ taskr unn er.php$class name =” task"$path = htasks/$class namephp"if (!file_exists( $path ) throw new exception( &

2、quot;no such file as $path"); 拋出異常，類文件不存 ffirequire_once( $path );$qclassname = htasks$classname”;if ( ! class_exists( $qclassname ) throw new exception( nno such class as $qclassnameh ); 拋出異常'類不存在 fatal error: un caught except! on 'exceptio n' with message 'no such class as tas

3、ks'task'stack trace:#0 main$myobj = new $qclassname();$myobj->dospeak();?> get_class檢查對彖的類instanceof驗證對象是否屈丁某個類<?phpclass cdproduct function getproductf) return new cdproduct( mexile on coldharbour lane","the", "alabama 3", 10.99, 60.33 ); / 返回一個類對象$product

4、=getproduct();if ( get_class( $product ) = 'cdproduct' ) print "$product is a cdproduct objectnn;?x?phpclass cdproduct jfunction getproduct() return new cdproduct( “exile on coldharbour lane”，"the", "alabama 3", 10.99, 60.33 );$product =getproduct();if ( $product ins

5、tanceof cdproduct ) print h$product is a cdproduct objectnn;?>get_class_methods得到類中所有的方法列表,只獲取public的方法，protected, private的方 法獲取不到。默認(rèn)的就是publico<?phpclass cdproduct fun ction _con struct) fun ctio n getplayle ngth() fun ction getsummaryline() function getproducerfirstname() function getproducer

6、mainname() function setdiscount() function getdiscount() function gettitle() function getprice() function getproducerf) print_r( get_class_methods( 'cdproduct*) );?> output:array( 0 => _con struct 1 => getplayle ngth 2 => getsummaryli ne 3=> getproducerfirstname 4 => getproduce

7、rmainname 5 => setdiscount 6 => getdiscount => gettitle 8 => getprice 9 => getproducer)更多驗證<?phpclass shopproduct interface incidental ;class cdproduct extends shopproduct implements incidentai public $coverurl; function _construct() function getplaylength() function getsummaryline

8、() function getproducerfirstname() function getproducermainname() function setdiscount() function getdiscount() function gettitle() return htitlen" function getprice() function getproducer() function getproduct() return new cdproduct();$product = getproduct(); / acquire an object$method = hgett

9、itleu; / define a method nameprint $product->$method(); / invoke the methodif (in_array( $method, get_class_methods( $product ) ) ) print $product->$method(); / invoke the methodif ( is_callable( array) $product, $method) ) ) print $product->$method(); / invoke the methodif ( method_exists(

10、 $product, $method ) ) print $product->$method(); / invoke the methodprint_r( get_class_vars( 'cdproduct1 ) );if ( is_subclass_of( $product, 'shopproduct* ) print ''cdproduct is a subclass of shopproductnh;if(is_subclass_of( $ product, 'in cide ntal' ) ) print hcdproduct i

11、s a subclass of in cide ntaln"訐 (in_array( 'in cidentaclassjmpleme nts( $product ) ) print "cdproduct is an in terface of in cide ntalrt'?> output: titletitletitletitlearrayf coverllrl =>)cdproduct is a subclass of shopproductcdproduct is a subclass of incide ntalcdproduct is

12、 an in terface of incidental_call方法<?phpclass othershop function thing() print hthingn”； function andanotherthingf) print "another thingnn; class delegator private $thirdpartyshop; function _construct() $this->thirdpartyshop = new othershopo; function _call( $method, $args ) / 當(dāng)調(diào)用未命名方法時執(zhí)行

13、 call 方法 if ( method_exists( $t h is->t h i rd pa rtysho p, $method ) ) return $this->thirdpartyshop->$method( ); $d = newdelegator();$d->thing();?>output:thing傳參使用<?phpclass othershop function thing() print hthi ngn" functionandanotherthing( $a, $b ) print "another thing

14、 ($a, $b)nh; class delegator private $thirdpartyshop; fun ctio n _construct() $t h is->t h i rd pa rtysho p = new othershop(); function _call( $method, $args ) if ( method_exists( $this->thirdpartyshop, $method ) return call_user_func_array(array) $this->thirdpartyshop,$method ), $args );$d

15、 = new delegator();$d->andanotherthing( "hi'1, "hello” );?> output:another thing (hi, hello)反射apifullshop.php<?phpclass shopproduct private $title; private $producermai nn ame;private$producerfirstname; protected $price; private $discount = 0; public function _construct( $titl

16、e, $firstname,$mainname, $price ) $this->title=$title;$this->produce rfirstname = $firstname;$this->producermai nn ame =$mainname;$this->price= $price; public function getproducerfirstname()return $this->producerfirstname; public function getproducermainname()return $this->producer

17、mainname; public function setdiscount( $num )$this->discount=$num; public function getdiscount() return $this->discount; public function gettitle() return $this->title; public function getprice() return ($this->price - $this->discount); public fun ctio n getproducer() return,l$this-&g

18、t;producerfirstnameh.h $this->producermainname" public functiongetsummaryline() $base = h$this->title ( $this->producermainname, h; $base = h$thjs->produce汗irstname )" return $base; class cdproduct extends shopproduct private $playlength = 0; public function _construct$title, $

19、firstname,$mai nn ame, sprice, $playl en gth=78 ) parent:_con struct) $title, $firstname,$mainname, $price ); $this->playlength = $playlength; public function getplaylength() retur n $this->playl eng th; public function getsummaryli ne() $base = parent:getsummaryline();$base 二 h: playing time

20、- $this->playlength"return$base; class bookproduct extends shopproduct private $numpages = 0; public function _construct( $title, $firstname,$mainname, $price, $numpages )parent:_construct( $title, $firstname,$mainname, $price );$this->numpages = $numpages; public function getnumberofpage

21、s() return$this->nu mpages; public function getsummaryli ne() $base =parent:getsummaryline(); $base 二 n: page count $this->numpages1'return $base; public function getprice() return $this->price; /*$productl = new cdproduct(hcdl,'/ "bob 蔦"bobbleson", 4, 50 );print $pro

22、ductl->getsummaryline()."nn;$product2 = new bookproductc'bookl","harry","harrelson",4,30);print$product2->getsummaryline()”rt'*/?>v?phprequire_once "fullshop.phph;$prod_class = new reflectionclass( 'cdproduct' );reflection:export( $prod_cla

23、ss );?> output:class <user> class cdproductexte ndsshopproduct d:xampphtdocspopp-code5fullshop.php 53-73 constants 0 - static properties 0 static methods 0 - properties 2 property <default> private $playlength property <default> protected $price methods 10 method <user, overw

24、rites shopproduct, ctor> public method _con struct d:xampphtdocspopp-code5fullshop.php 56 61parameters 5 parameter #0 vrequired> $title parameter #1 vrequired> $firstname parameter #2 <required> $mainname parameter #3 <required> $price parameter #4 <optiona卜 $playlength = 78

25、method <user> public methodgetplaylength d:xampphtdocspopp-code5fullshop.php 63 65 method<usec overwrites shopproduct, prototype shopproduct> public method getsummaryune d:xampphtdocspopp-code5fullshop.php 67 - 71 method <user, inheritsshopproduct> public methodgetproduce rfirstnam

26、ed:xampphtdocspopp-code5fullshop.php 17 - 19 method <user, inherits shopproduct>public method getproducermainname d:xampphtdocspopp-code5fullshop.php21 - 23 method <user, inherits shopproduct> public method setdiscount d:xampphtdocspopp-code5fullshop.php 25 27 parameters 1 parameter #0&l

27、t;required> $num method <user, inherits shopproduct> public method getdiscount d:xampphtdocspopp-code5fullshop.php 29 - 31 method <user, inheritsshopproduct> public method gettitle d:xampphtdocspopp-code5fullshop.php 33-35 method <user, inherits shopproduct> public method getpri

28、ce d:xampphtdocspopp-code5fullshop.php 37 39 method <useg inherits shopproduct>public method getproducer d:xampphtdocspopp-code5fullshop.php 41 - 44點(diǎn)評：把類看的透徹的一塌糊涂，比var_dump強(qiáng)多了。哪些屬性，繼承了什么類。類中的 方法哪些是自己的，哪些是重寫的，哪些是繼承的，一目了然。查看類數(shù)據(jù)<?phprequire_once(,lfullshop.php,);f un ction classdata( reflecti

29、on class $class ) $details = ,lfl; $name = $class->getname(); if ( $class->isuserdefined() ) $details 二 n$name is user definedn" 訐($class->islnternal() ) $details .= "$name is built-inn" 訐 ($class->islnterface() ) $details .= ”$name is interfacen" if ( $class->isab

30、stract() $details ="$name is an abstract classn”; if ( $class->isfinal() ) $details 二 ”$name is a final classn”； if ( $class->islnstantiable() ) $details = ”$name can be instantiatedn" else $details = ”$name can not be instantiatedrt; return $details;$prod_class = new reflecti on cla

31、ss) 'cdproduct' );pri nt classdata( $prod_class );?> output:cdproduct is user definedcdproduct can be instantiated查看方法數(shù)據(jù)<?phprequire_once ,fullshop.php,;$prod_class = new reflectionclass( cdproduct' );$methods = $prod_class->getmethods();foreach ( $methods as $method ) print met

32、hoddata( $method ); print nn-nu;function methoddata( reflectionmethod $method ) $details = lth; $name = $method>getname(); if ( $method>isuserdefined() ) $details =“$name is user definedn”; if ( $method->islnternal() ) $details .= *'$name is built-inn" if ( $method->isabstract()

33、 $details .= "$name is abstractn" if ( $method->ispublic() ) $details .= "$name is publicn" 訐($method->isprotected() ) $details .= "$name is protectednn; if ($method->isprivate() ) $details .= ”$name is privaten" if ( $method->isstatic() $details .= "$n

34、ame is staticn" if ( $method->isfinal() $details .= "$name is finaln" if ($method->isc on structor() ) $details 二"$n ame is the con structornh; 訐 ($method > returnsrefere nce() ) $details 二 ”$n ame retur ns a ref ere nee (as opposed to a value)nh; return $details;?> o

35、utput:_con struct is user defined_con struct is public_construct is the con structor-getplayle ngth is user definedgetplaylength is public-一getsummaryline is user definedgetsummaryline is public-一getproduce 汗 irstnameis user definedgetproducerfirstname ispublicgetproducermainname is user definedgetproducermainname is publicsetdiscount is user definedsetdiscount is publicgetdiscount is user definedgetdiscount is public-gettitle is user definedgettitle is public-getprice is user definedgetprice is public-getproducer is user define