PHP中简单工厂模式实例讲解

<?php
    /**
     * 求余类（remainder）
     *
     */
    class OperationRem extends Operation {
        public function getValue($num1,$num2){
            return $num1%$num12;
        }
    }
?>

<?php
    /**
     * 工程类，主要用来创建对象
     * 功能：根据输入的运算符号，工厂就能实例化出合适的对象
     *
     */
    class Factory{
        public static function createObj($operate){
            switch ($operate){
                case '+':
                    return new OperationAdd();
                    break;
                case '-':
                    return new OperationSub();
                    break;
                case '*':
                    return new OperationSub();
                    break;
                case '/':
                    return new OperationDiv();
                    break;
            }
        }
    }
    $test=Factory::createObj('/');
    $result=$test->getValue(23,0);
    echo $result;
?>

private function __get($property_name)

{

if(isset($this->$property_name))

{

return($this->$property_name);

}else

{

return(NULL);

}

}

//__set()方法用来设置私有属性

private function __set($property_name, $value)

{

$this->$property_name = $value;

}

<?php

class Person

{

//下面是人的成员属性， 都是封装的私有成员

private $name;          //人的名子

private $sex;           //人的性别

private $age;           //人的年龄

//__get()方法用来获取私有属性

private function __get($property_name)

{

echo "在直接获取私有属性值的时候，自动调用了这个__get()方法<br>";

if(isset($this->$property_name))

{

return($this->$property_name);

}

else

{

return(NULL);

}

}

//__set()方法用来设置私有属性

private function __set($property_name, $value)

{

echo "在直接设置私有属性值的时候，自动调用了这个__set()方法为私有属性赋值<br>";

$this->$property_name = $value;

}

}

$p1=new Person();

//直接为私有属性赋值的操作， 会自动调用__set()方法进行赋值

$p1->name="张三";

$p1->sex="男";

$p1->age=20;

//直接获取私有属性的值， 会自动调用__get()方法，返回成员属性的值

echo "姓名：".$p1->name."<br>";

echo "性别：".$p1->sex."<br>";

echo "年龄：".$p1->age."<br>";

?>

private function __isset($nm)

{

echo "当在类外部使用isset()函数测定私有成员$nm时，自动调用<br>";

return isset($this->$nm);

}

private function __unset($nm)

{

echo "当在类外部使用unset()函数来删除私有成员时自动调用的<br>";

unset($this->$nm);

}

我们来看一个完整的实例：

<?php

class Person

{

//下面是人的成员属性

private $name;        //人的名子

private $sex;         //人的性别

private $age;         //人的年龄

//__get()方法用来获取私有属性

private function __get($property_name)

{

if(isset($this->$property_name))

{

return($this->$property_name);

}else {

return(NULL);

}

}

//__set()方法用来设置私有属性

private function __set($property_name, $value)

{

$this->$property_name = $value;

}

//__isset()方法

private function __isset($nm)

{

echo "isset()函数测定私有成员时，自动调用<br>";

return isset($this->$nm);

}

//__unset()方法

private function __unset($nm)

{

echo "当在类外部使用unset()函数来删除私有成员时自动调用的<br>";

unset($this->$nm);

}

}

$p1=new Person();

$p1->name="this is a person name";

//在使用isset()函数测定私有成员时，自动调用__isset()方法帮我们完成，返回结果为true

echo var_dump(isset($p1->name))."<br>";

echo $p1->name."<br>";

//在使用unset()函数删除私有成员时，自动调用__unset()方法帮我们完成，删除name私有属性

unset($p1->name);

//已经被删除了， 所这行不会有输出

echo $p1->name;

?>

SetCookie("WithExpire", "Expire in 1 hour", time()+3600);//3600秒=1小时

SetCookie("FullCookie", "Full cookie value", time()+3600, "/forum", ".phpuser.com", 1);

class QueueSvc
{/*{{{*/
    private $length; // 队列的长度
    private $server_arr;
   
    public function __construct($length,$server_arr)
    {
        $this->length = $length;
        $this->server_arr = $server_arr;
    }
   
    public function getServerArr()
    {
        return $this->server_arr;
    }
   
    public function set($server_name)
    {
        self::push($server_name);
    }
   
    private function push($server_name)
    {
        //有重复的记录，把重复的删掉
        if(self::isServerExist($server_name)){
            self::removeRepeat($server_name);
        }else{
            if(self::isFull()){
                //如果已经满了，要把队列最后一个记录删掉
                array_pop($this->server_arr);
            }
        }
        //如果队列为空，先置为空数组
        if(empty($this->server_arr))
            $this->server_arr = array();
        //向队列头添加数据
        array_unshift($this->server_arr,$server_name); 
    }
   
    private function isFull()
    {
        if(is_array($this->server_arr) && (count($this->server_arr) >= $this->length))
            return true;
        return false;
    }
   
    private function isServerExist($server_name)
    {
        if(is_array($this->server_arr) && in_array($server_name,$this->server_arr))
            return true;
        return false;
    }
   
    private function removeRepeat($server_name)
    {
        if(is_array($this->server_arr) && in_array($server_name,$this->server_arr))
        {
            foreach($this->server_arr as $key=>$value)
            {
                if($server_name == $value)
                {
                    $this->array_remove($this->server_arr,$key);
                }
            }  
        }
    }
   
    private function array_remove(&$arr, $offset) {    
        array_splice ( $arr, $offset, 1 );
    }
}/*}}}*/require_once('queue_svc.php');
class CookieSvc
{/*{{{*/
    const   COOKIE_KEY = "GAME_SERVER";
   
    const   SEPARATE   = "|";

    const   COOKIE_LENGTH = "2";
   
    public function getCookieArr()
    {/*{{{*/
        $server_str =  $_COOKIE[self::COOKIE_KEY];
        $server_str =  $_COOKIE['GAME_SERVER'];
        if($server_str == ''){
            $result =  array();
        }else{
            $result = explode(self::SEPARATE,$server_str);
        }
        return $result;
    }/*}}}*/
   
    public function set($cookie_id)
    {/*{{{*/
        $server_arr = self::getCookieArr();
        if($cookie_id != false)
        {
            $que = new QueueSvc(self::COOKIE_LENGTH,$server_arr);
            $que->set($cookie_id);
            $server_new = $que->getServerArr();
            if(is_array($server_new))
            {
                $cookie_str = implode(self::SEPARATE,$server_new);
                setcookie(self::COOKIE_KEY,$cookie_str,time()+3600,'/');
            }
        }
    }/*}}}*/
}/*}}}*/

require_once("queue_svc.php");

require_once("cookie_svc.php");

$cookie_id = '4';

CookieSvc::set($cookie_id);

<?php
 require'./download.php';
 /**
  * 遍历目录，打包成zip格式
  */
     class traverseDir{
         public $currentdir;//当前目录
         public $filename;//文件名
         public $fileinfo;//用于保存当前目录下的所有文件名和目录名以及文件大小
         public function __construct(){
             $this->currentdir=getcwd();//返回当前目录
         }       
         //遍历目录
         public function scandir($filepath){
             if (is_dir($filepath)){
                     $arr=scandir($filepath);
                     foreach ($arr as $k=>$v){
                         $this->fileinfo[$v][]=$this->getfilesize($v);
                     }
                 }else {
                     echo "<script>alert('当前目录不是有效目录');</script>";
                 }
         }
         /**
          * 返回文件的大小
          *
          * @param string $filename 文件名
          * @return 文件大小(KB)
          */
         public function getfilesize($fname){
             return filesize($fname)/1024;
         }
        
         /**
          * 压缩文件(zip格式)
          */
         public function tozip($items){
             $zip=new ZipArchive();
             $zipname=date('YmdHis',time());
             if (!file_exists($zipname)){
                 $zip->open($zipname.'.zip',ZipArchive::OVERWRITE);//创建一个空的zip文件
                 for ($i=0;$i<count($items);$i++){
                     $zip->addFile($this->currentdir.'/'.$items[$i],$items[$i]);
                 }
                 $zip->close();
                 $dw=new download($zipname.'.zip'); //下载文件
                 $dw->getfiles();
                 unlink($zipname.'.zip'); //下载完成后要进行删除   
             }
         }
     }
 ?>

<?php
 /**
  * 下载文件
  *
  */
     class download{
         protected $_filename;
         protected $_filepath;
         protected $_filesize;//文件大小
         public function __construct($filename){
             $this->_filename=$filename;
             $this->_filepath=dirname(__FILE__).'/'.$filename;
         }
         //获取文件名
         public function getfilename(){
             return $this->_filename;
         }
        
         //获取文件路径（包含文件名）
         public function getfilepath(){
             return $this->_filepath;
         }
        
         //获取文件大小
         public function getfilesize(){
             return $this->_filesize=number_format(filesize($this->_filepath)/(1024*1024),2);//去小数点后两位
         }
         //下载文件的功能
         public function getfiles(){
             //检查文件是否存在
             if (file_exists($this->_filepath)){
                 //打开文件
                 $file = fopen($this->_filepath,"r");
                 //返回的文件类型
                 Header("Content-type: application/octet-stream");
                 //按照字节大小返回
                 Header("Accept-Ranges: bytes");
                 //返回文件的大小
                 Header("Accept-Length: ".filesize($this->_filepath));
                 //这里对客户端的弹出对话框，对应的文件名
                 Header("Content-Disposition: attachment; filename=".$this->_filename);
                 //修改之前，一次性将数据传输给客户端
                 echo fread($file, filesize($this->_filepath));
                 //修改之后，一次只传输1024个字节的数据给客户端
                 //向客户端回送数据
                 $buffer=1024;//
                 //判断文件是否读完
                 while (!feof($file)) {
                     //将文件读入内存
                     $file_data=fread($file,$buffer);
                     //每次向客户端回送1024个字节的数据
                     echo $file_data;
                 }
                
                 fclose($file);
             }else {
                 echo "<script>alert('对不起,您要下载的文件不存在');</script>";
             }
         }
     }
 ?>

<script type="text/javascript" src="jquery-1.7.2.js"></script>
 <script type="text/javascript" src="ajax.js"></script>
 <?php
     header("Content-type:text/html;charset=utf8");
     require('./getfile.php');
     $scandir=new traverseDir();
     $scandir->scandir($scandir->currentdir);
     $scandir->currentdir;
    
     if (isset($_POST['down_load'])){
         $items=$_POST['items'];
         $scandir->tozip($items);//将文件压缩成zip格式
     }
     echo "当前的工作目录:".$scandir->currentdir;
     echo "<br>当前目录下的所有文件";
 ?>
 
 <form action="list.php" method="POST">
 <table>
     <tr>
         <td></td>
         <td>名称</td>
         <td>大小(KB)</td>
     </tr>
 <?php
     $res=$scandir->fileinfo;
     foreach ($res as $k=>$v){
         if (!($k=='.' || $k=='..'))    {//过滤掉.和..
 ?>
     <tr>
         <td><input type="checkbox" name="items[]" class="filename" value="<?php echo $k;?>"></td>
         <td><?php echo $k; ?></td>
         <td><?php echo number_format($v[0],0); ?></td>
     </tr>
 <?php
         }
     }
 ?>
     <tr>
         <td><input type="checkbox" id="selall"><label for="selall">全选</label></td>
         <td><input type="submit" name="down_load" value="打包并下载" id="tozip_tetttt"></td>
     </tr>
 </table>
 </form>

<?php
if ($argc != 2 || in_array($argv[1], array('--help', '-?'))) {
?>
backup   Ver 0.01, for Win95/Win98/WinNT/Win2000/WinXP on i32
Copyright (C) 2000 ptker All rights reserved. This is free software,and you are welcome to modify and redistribute it
under the GPL license

PHP Shell script for the backup MySQL database.

Usage: <?php echo $argv[0]; ?> <option>

   <option> can be database name you would like to backup.
   With the --help, or -? options, you can get this help and exit.
<?php
} else {
$dbname = $argv[1];
$dump_tool = "c:\mysql\bin\mysqldump";
$rar_tool = "d:\php4\rar";
@exec("$dump_tool --opt -u user -ppassword $dbname > ./$dbname.sql");
@exec("$rar_tool a -ag_yyyy_mm_dd_hh_mm $dbname.rar $dbname.sql");
@unlink("$dbname.sql");
echo "Backup complete!";
}
?>