The concept of php classes and objects

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';   
 }

<?php   

$arr = array (   
     &#39;Project/Classes&#39;,   
    &#39;Project/Classes/Children&#39;,   
    &#39;Project/Interfaces&#39;  
 );  

 foreach($arr as $dir) {   

    $dir_list = opendir($dir);  

    while ($file = readdir($dir_list)) {   
         $path = $dir.DIRECTORY_SEPARATOR.$file;   
         if(in_array($file, array(&#39;.&#39;, &#39;..&#39;)) || is_dir($path))   
             continue;  
         if (strpos($file, ".class.php"))   
             require_once $path;   
     }   
}   

 ?>

view sourceprint?
// configuration.php   

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

<?php   
    require &#39;autoload_generated.php&#39;;  
    function autoload($className) {   
       global $autoload_list;   
       require_once $autoload_list[$className];   
    }  
      $x = new A();   
?>

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 :".$this->name."<br />";
        echo "my age is :".$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:".$this->name."<br />";
    echo "my age is:".$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:".$this->name."<br />";
        echo "my shool is:".$this->school;
    }       
}

$t1 = new Student();
$t1->name = "zhangsan";
$t1->school = "beijindaxue";
$t1->study();

<?php
class OtherClass extends MyClass
{
    public static $my_static = &#39;static var&#39;;

    public static function doubleColon() {
        echo parent::CONST_VALUE . "\n";
        echo self::$my_static . "\n";
    }
}

OtherClass::doubleColon();
?>

<?php

Class Person{
    // 定义静态成员属性
    public static $country = "中国";
    // 定义静态成员方法
    public static function myCountry() {
        // 内部访问静态成员属性
        echo "我是".self::$country."人<br />";
    }
}
class Student extends Person {
    function study() {
        echo "我是". parent::$country."人<br />";
    }
}
// 输出成员属性值
echo Person::$country."<br />";     // 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."<br />";    // 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()."<br />";
    }
}
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:".$this->name."<br />";
    echo "my age is:".$this->age;
    }
}

class Student extends Person {
    var $school;    //学生所在学校的属性
    
    function study() {
        echo "my name is:".$this->name."<br />";
        echo "my shool is:".$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 "<pre class="brush:php;toolbar:false">\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&#39;s experiment with the private property named &#39;hidden&#39;:\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";

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();

<?php
class Example
{
    public static function factory($type)
    {
        if (include_once &#39;Drivers/&#39; . $type . &#39;.php&#39;) {
            $classname = &#39;Driver_&#39; . $type;
            return new $classname;
        } else {
            throw new Exception (&#39;Driver not found&#39;);
        }
    }
}
?>

<?php
interface IUser{
 function getName();
}
class User implements IUser{
 public function construct($id){}
 public function getName(){
     return "haha";
 }
}
class UserFactory{
    public static function Create($id){
  return new User($id);
 }
}
$uo =UserFactory::Create(1);
echo $uo->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 "<br />";
echo singleton::getInstance(&#39;People&#39;)->sayHi();

<?php
   class User 
   { 
       public $name; 
       public $id;

       function construct() 
       { 
           $this->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)));