php 类与对象的概念

function autoload($class){ require_once("classes/$class.class.php"); }

view sourceprint? // Main.class function autoload($class_name) { $path = str_replace('_', DIRECTORY_SEPARATOR, $class_name); require_once $path.'.php'; }

view sourceprint? // configuration.php array_of_associations = array( 'MainSuperClass' = 'C:/Main/Super/Class.php', 'MainPoorClass' = 'C:/blablabla/gy.php' );

class Person { public $name; public $age; //定义一个构造方法初始化赋值 public function construct($name,$age) { $this->name=$name; $this->age=$age; } public function say() { echo "my name is :".$this->name."
"; echo "my age is :".$this->age; } //析构函数 function destruct() { echo "goodbye :".$this->name; } } $p1=new Person("ren", 25); $p1->say();

class MyClass { public $public = 'Public'; protected $protected = 'Protected'; private $private = 'Private'; function printHello() { echo $this->public; echo $this->protected; echo $this->private; } } $obj = new MyClass(); echo $obj->public; // 这行能被正常执行 echo $obj->protected; // 这行会产生一个致命错误 echo $obj->private; // 这行也会产生一个致命错误 $obj->printHello(); // 输出 Public、Protected 和 Private

class Person { public $name; public $age; function say() { echo "my name is:".$this->name."
"; echo "my age is:".$this->age; } } // 类的继承 class Student extends Person { var $school; //学生所在学校的属性 function study() { echo "my name is:".$this->name."
"; echo "my shool is:".$this->school; } } $t1 = new Student(); $t1->name = "zhangsan"; $t1->school = "beijindaxue"; $t1->study();

"; } } class Student extends Person { function study() { echo "我是". parent::$country."人
"; } } // 输出成员属性值 echo Person::$country."
"; // 输出：中国 $p1 = new Person(); //echo $p1->country; // 错误写法 // 访问静态成员方法 Person::myCountry(); // 输出：我是中国人 // 静态方法也可通过对象访问： $p1->myCountry(); // 子类中输出成员属性值 echo Student::$country."
"; // 输出：中国 $t1 = new Student(); $t1->study(); // 输出：我是中国人 ?>

abstract class AbstractClass{ // 定义抽象方法 abstract protected function getValue(); // 普通方法 public function printOut(){ print $this->getValue()."
"; } } class ConcreteClass extends AbstractClass{ protected function getValue(){ return "abstract ";//抽象方法的实现 } } $class1 = new ConcreteClass; $class1->printOut();

abstract class AbstractClass { // 强制要求子类定义这些方法 abstract protected function getValue(); abstract protected function prefixValue($prefix); // 普通方法（非抽象方法） public function printOut() { print $this->getValue() . "\n"; } } class ConcreteClass1 extends AbstractClass { protected function getValue() { return "ConcreteClass1"; } public function prefixValue($prefix) { return "{$prefix}ConcreteClass1"; } } class ConcreteClass2 extends AbstractClass { public function getValue() { return "ConcreteClass2"; } public function prefixValue($prefix) { return "{$prefix}ConcreteClass2"; } } $class1 = new ConcreteClass1; $class1->printOut(); echo $class1->prefixValue('FOO_') ."\n"; $class2 = new ConcreteClass2; $class2->printOut(); echo $class2->prefixValue('FOO_') ."\n";

class Person { public $name; public $age; function say() { echo "my name is:".$this->name."
"; echo "my age is:".$this->age; } }

class Student extends Person { var $school; //学生所在学校的属性 function study() { echo "my name is:".$this->name."
"; echo "my shool is:".$this->school; } } $t1 = new Student(); $t1->name = "zhangsan"; $t1->school = "beijindaxue"; $t1->study();

interface iTemplate { public function setVariable($name, $var); public function getHtml($template); }

class Template implements iTemplate { private $vars = array(); public function setVariable($name, $var) { $this->vars[$name] = $var; } public function getHtml($template) { foreach($this->vars as $name => $value) { $template = str_replace('{' . $name . '}', $value, $template); } return $template; } }

interface User{ function getDiscount(); function getUserType(); }

class VipUser implements User{ // VIP 用户折扣系数 private $discount = 0.8; function getDiscount() { return $this->discount; } function getUserType() { return "VIP user"; } } class Goods{ var $price = 100; var $vc; //定义 User 接口类型参数，这时并不知道是什么用户 function run(User $vc){ $this->vc = $vc; $discount = $this->vc->getDiscount(); $usertype = $this->vc->getUserType(); echo $usertype."goods Price:".$this->price*$discount; } } $display ->run(new VipUser); //可以是更多其他用户类型

class Test{ public function call($name,$args){ if($name== 'null' && count($args)==2 ){ $type='num'; foreach($args as $key => $val){ if(!(is_int($val) || is_float($val))){ $type= 'string'; } } $method=$name.ucfirst($type); if(method_exists($this,$method),$args){ call_user_func_array(array($this,$method),$args); } } } public addNum($i,$j){ echo $i+$j; } public addString($i,$j){ echo $i.$j; } } $test =new Test(); $test->add(3,4); $test->add(3,'4');

class MemberTest { private $data = array();//被重载的数据保存在此 public $declared = 1;/** 重载不能被用在已经定义的属性 */ private $hidden = 2; /** 只有从类外部访问这个属性时，重载才会发生 */ public function set($name, $value) { echo "Setting '$name' to '$value'\n"; $this->data[$name] = $value; } public function get($name) { echo "Getting '$name'\n"; if (array_key_exists($name, $this->data)) { return $this->data[$name]; } $trace = debug_backtrace(); trigger_error( 'Undefined property via get(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'], E_USER_NOTICE); return null; } /** PHP 5.1.0之后版本 */ public function isset($name) { echo "Is '$name' set?\n"; return isset($this->data[$name]); } /** PHP 5.1.0之后版本 */ public function unset($name) { echo "Unsetting '$name'\n"; unset($this->data[$name]); } /** 非魔术方法 */ public function getHidden() { return $this->hidden; } } echo "
\n"; $obj = new MemberTest; $obj->a = 1; echo $obj->a . "\n\n"; var_dump(isset($obj->a)); unset($obj->a); var_dump(isset($obj->a)); echo "\n"; echo $obj->declared . "\n\n"; echo "Let's experiment with the private property named 'hidden':\n"; echo "Privates are visible inside the class, so get() not used...\n"; echo $obj->getHidden() . "\n"; echo "Privates not visible outside of class, so get() is used...\n"; echo $obj->hidden . "\n";
        

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class Person{ private $data =array(); function set($name,$value){ $this->data[$name]=$value; } function get($name){ return $this->data[$name]; } }

class MyClass { public $var1 = 'value 1'; public $var2 = 'value 2'; public $var3 = 'value 3'; protected $protected = 'protected var'; private $private = 'private var'; function iterateVisible() { echo "MyClass::iterateVisible:\n"; foreach($this as $key => $value) { print "$key => $value\n"; } } } $class = new MyClass(); foreach($class as $key => $value) { print "$key => $value\n"; } echo "\n"; $class->iterateVisible();

getName(); ?>

class Stat{ static $instance = NULL; static function getInstance(){ if(self::$instance == NULL){ self::$instance = new Stat(); } return self::$instance; } private function construct(){ } private function clone(){ } function sayHi(){ return "The Class is saying hi to u "; } } echo Stat::getInstance()->sayHi();

class Teacher{ function sayHi(){ return "The teacher smiling and said 'Hello '"; } static function getInstance(){ static $instance; if(!isset($instance)){ $c = CLASS; $instance = new $c; } return $instance; } } echo Teacher::getInstance()->sayHi();

class singleton{ function getInstance($class){ static $instances = array(); if(!array_key_exists($class,$instances)){ $instances[$class] = &new $class; } $instance = $instances[$class]; return $instance; } } class People{ function sayHi(){ return 'Hello i am a people?'; } } echo "
"; echo singleton::getInstance('People')->sayHi();

id = uniqid(); //give user a unique ID 赋予一个不同的ID } function sleep() { return(array("name")); //do not serialize this->id 不串行化id } function wakeup() { $this->id = uniqid(); //give user a unique ID } } $u = new User; $u->name = "HAHA"; $s = serialize($u); //serialize it 串行化 注意不串行化id属性,id的值被抛弃 $u2 = unserialize($s); //unserialize it 反串行化 id被重新赋值 //$u and $u2 have different IDs $u和$u2有不同的ID var_dump($u); var_dump($u2); ?>

class ClassA { var $int; var $str; var $bool; var $obj; var $pr; } $a = new ClassA(); $a->int = 1; $a->str = "Hello"; $a->bool = false; $a->obj = $a; $a->pr = &$a->str; echo serialize($a); //O:6:"ClassA":5:{s:3:"int";i:1;s:3:"str";s:5:"Hello";s:4:"bool";b:0;s:3:"obj";r:1;s:2:"pr";R:3;}

class MyClass implements Serializable { public $member; function MyClass() { $this->member = 'member value'; } public function serialize() { return wddx_serialize_value($this->member); } public function unserialize($data) { $this->member = wddx_deserialize($data); } } $a = new MyClass(); echo serialize($a); echo "\n"; print_r(unserialize(serialize($a)));