PHP面向对象程序设计之类与反射API详解

output:

__construct
[1] => getPlayLength
[2] => getSummaryLine
[3] => getProducerFirstName
[4] => getProducerMainName
[5] => setDiscount
[6] => getDiscount
[7] => getTitle
[8] => getPrice
[9] => getProducer
)

更多验证

$method(); // invoke the method
if ( in_array( $method,get_class_methods( $product ) ) ) {
print $product->$method(); // invoke the method
}
if ( is_callable( array( $product,$method) ) ) {
print $product->$method(); // invoke the method
}
if ( method_exists( $product,$method ) ) {
print $product->$method(); // invoke the method
}
print_r( get_class_vars( 'CdProduct' ) );
if ( is_subclass_of( $product,'ShopProduct' ) ) {
print "CdProduct is a subclass of ShopProduct\n";
}
if ( is_subclass_of( $product,'incidental' ) ) {
print "CdProduct is a subclass of incidental\n";
}
if ( in_array( 'incidental',class_implements( $product )) ) {
print "CdProduct is an interface of incidental\n";
}
?>

output:

)
CdProduct is a subclass of ShopProduct
CdProduct is a subclass of incidental
CdProduct is an interface of incidental

thirdpartyShop = new OtherShop();
}
function __call( $method,$args ) { // 当调用未命名方法时执行call方法
if ( method_exists( $this->thirdpartyShop,$method ) ) {
return $this->thirdpartyShop->$method( );
}
}
}
$d = new Delegator();
$d->thing();
?>

output:

thing

thirdpartyShop = new OtherShop();
}
function __call( $method,$args ) {
if ( method_exists( $this->thirdpartyShop,$method ) ) {
return call_user_func_array(
array( $this->thirdpartyShop,$method ),$args );
}
}
}
$d = new Delegator();
$d->andAnotherThing( "hi","hello" );
?>

output:

another thing (hi,hello)

反射API

fullshop.php

title = $title;
$this->producerFirstName = $firstName;
$this->producerMainName = $mainName;
$this->price = $price;
}
public function getProducerFirstName() {
return $this->producerFirstName;
}
public function getProducerMainName() {
return $this->producerMainName;
}
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 - $this->discount);
}
public function getProducer() {
return "{$this->producerFirstName}".
" {$this->producerMainName}";
}
public function getSummaryLine() {
$base = "{$this->title} ( {$this->producerMainName},";
$base .= "{$this->producerFirstName} )";
return $base;
}
}
class CdProduct extends ShopProduct {
private $playLength = 0;
public function __construct( $title,$price,$playLength=78 ) {
parent::__construct( $title,$price );
$this->playLength = $playLength;
}
public function getPlayLength() {
return $this->playLength;
}
public function getSummaryLine() {
$base = parent::getSummaryLine();
$base .= ": playing time - {$this->playLength}";
return $base;
}
}
class BookProduct extends ShopProduct {
private $numPages = 0;
public function __construct( $title,$numPages ) {
parent::__construct( $title,$price );
$this->numPages = $numPages;
}
public function getNumberOfPages() {
return $this->numPages;
}
public function getSummaryLine() {
$base = parent::getSummaryLine();
$base .= ": page count - {$this->numPages}";
return $base;
}
public function getPrice() {
return $this->price;
}
}
/*
$product1 = new CdProduct("cd1","bob","bobbleson",4,50 );
print $product1->getSummaryLine()."\n";
$product2 = new BookProduct("book1","harry","harrelson",30 );
print $product2->getSummaryLine()."\n";
*/
?>

output:

class CdProduct extends ShopProduct ] {
@@ D:\xampp\htdocs\popp-code\5\fullshop.php 53-73
- Constants [0] {
}
- Static properties [0] {
}
- Static methods [0] {
}
- Properties [2] {
Property [ private $playLength ]
Property [ protected $price ]
}
- Methods [10] {
Method [ public method __construct ] {
@@ D:\xampp\htdocs\popp-code\5\fullshop.php 56 - 61
- Parameters [5] {
Parameter #0 [ $title ]
Parameter #1 [ $firstName ]
Parameter #2 [ $mainName ]
Parameter #3 [ $price ]
Parameter #4 [ $playLength = 78 ]
}
}
Method [ public method getPlayLength ] {
@@ D:\xampp\htdocs\popp-code\5\fullshop.php 63 - 65
}
Method [ public method getSummaryLine ] {
@@ D:\xampp\htdocs\popp-code\5\fullshop.php 67 - 71
}
Method [ public method getProducerFirstName ] {
@@ D:\xampp\htdocs\popp-code\5\fullshop.php 17 - 19
}
Method [ public method getProducerMainName ] {
@@ D:\xampp\htdocs\popp-code\5\fullshop.php 21 - 23
}
Method [ public method setDiscount ] {
@@ D:\xampp\htdocs\popp-code\5\fullshop.php 25 - 27
- Parameters [1] {
Parameter #0 [ $num ]
}
}
Method [ public method getDiscount ] {
@@ D:\xampp\htdocs\popp-code\5\fullshop.php 29 - 31
}
Method [ public method getTitle ] {
@@ D:\xampp\htdocs\popp-code\5\fullshop.php 33 - 35
}
Method [ public method getPrice ] {
@@ D:\xampp\htdocs\popp-code\5\fullshop.php 37 - 39
}
Method [ public method getProducer ] {
@@ D:\xampp\htdocs\popp-code\5\fullshop.php 41 - 44
}
}
}

点评：把类看的透彻的一塌糊涂，比var_dump强多了。哪些属性，继承了什么类。类中的方法哪些是自己的，哪些是重写的，哪些是继承的，一目了然。