php Cookies 操作類

Cookies 操作類

功能：

1.儲存，讀取，更新，清除cookies資料。

2.可設定首碼。

3.強制逾時控制。

4.cookies資料可以是字串，數組，對象等。

Cookies.class.php

<?php/** Cookies class 儲存,讀取,更新,清除cookies資料。可設定首碼。強制逾時。資料可以是字串,數組,對象等。*   Date:   2013-12-22*   Author: fdipzone*   Ver:    1.0**   Func:*   public   set        設定cookie*   public   get        讀取cookie*   public   update     更新cookie*   public   clear      清除cookie*   public   setPrefix  設定首碼*   public   setExpire  設定到期時間*   private  authcode   加密/解密*   private  pack       將資料打包*   private  unpack     將資料解包*   private  getName    擷取cookie name,增加prefix處理*/class Cookies{ // class start    private $_prefix = '';                                                  // cookie prefix    private $_securekey = 'ekOt4_Ut0f3XE-fJcpBvRFrg506jpcuJeixezgPNyALm';   // encrypt key    private $_expire = 3600;                                                // default expire    /** 初始化    * @param String $prefix     cookie prefix    * @param int    $expire     到期時間    * @param String $securekey  cookie secure key    */    public function __construct($prefix='', $expire=0, $securekey=''){        if(is_string($prefix) && $prefix!=''){            $this->_prefix = $prefix;        }        if(is_numeric($expire) && $expire>0){            $this->_expire = $expire;        }        if(is_string($securekey) && $securekey!=''){            $this->_securekey = $securekey;        }    }    /** 設定cookie    * @param String $name   cookie name    * @param mixed  $value  cookie value 可以是字串,數組,對象等    * @param int    $expire 到期時間    */    public function set($name, $value, $expire=0){        $cookie_name = $this->getName($name);        $cookie_expire = time() + ($expire? $expire : $this->_expire);        $cookie_value = $this->pack($value, $cookie_expire);        $cookie_value = $this->authcode($cookie_value, 'ENCODE');        if($cookie_name && $cookie_value && $cookie_expire){            setcookie($cookie_name, $cookie_value, $cookie_expire);        }    }    /** 讀取cookie    * @param  String $name   cookie name    * @return mixed          cookie value    */    public function get($name){        $cookie_name = $this->getName($name);        if(isset($_COOKIE[$cookie_name])){            $cookie_value = $this->authcode($_COOKIE[$cookie_name], 'DECODE');            $cookie_value = $this->unpack($cookie_value);            return isset($cookie_value[0])? $cookie_value[0] : null;        }else{            return null;        }    }    /** 更新cookie,只更新內容,如需要更新到期時間請使用set方法    * @param  String $name   cookie name    * @param  mixed  $value  cookie value    * @return boolean    */    public function update($name, $value){        $cookie_name = $this->getName($name);        if(isset($_COOKIE[$cookie_name])){            $old_cookie_value = $this->authcode($_COOKIE[$cookie_name], 'DECODE');            $old_cookie_value = $this->unpack($old_cookie_value);            if(isset($old_cookie_value[1]) && $old_cookie_value[1]>0){ // 擷取之前的到期時間                $cookie_expire = $old_cookie_value[1];                // 更新資料                $cookie_value = $this->pack($value, $cookie_expire);                $cookie_value = $this->authcode($cookie_value, 'ENCODE');                if($cookie_name && $cookie_value && $cookie_expire){                    setcookie($cookie_name, $cookie_value, $cookie_expire);                    return true;                }            }        }        return false;    }    /** 清除cookie    * @param  String $name   cookie name    */    public function clear($name){        $cookie_name = $this->getName($name);        setcookie($cookie_name);    }    /** 設定首碼    * @param String $prefix cookie prefix    */    public function setPrefix($prefix){        if(is_string($prefix) && $prefix!=''){            $this->_prefix = $prefix;        }    }    /** 設定到期時間    * @param int $expire cookie expire    */    public function setExpire($expire){        if(is_numeric($expire) && $expire>0){            $this->_expire = $expire;        }    }    /** 擷取cookie name    * @param  String $name    * @return String    */    private function getName($name){        return $this->_prefix? $this->_prefix.'_'.$name : $name;    }    /** pack    * @param  Mixed  $data      資料    * @param  int    $expire    到期時間 用於判斷    * @return    */    private function pack($data, $expire){        if($data===''){            return '';        }        $cookie_data = array();        $cookie_data['value'] = $data;        $cookie_data['expire'] = $expire;        return json_encode($cookie_data);    }    /** unpack    * @param  Mixed  $data 資料    * @return              array(資料,到期時間)    */    private function unpack($data){        if($data===''){            return array('', 0);        }        $cookie_data = json_decode($data, true);        if(isset($cookie_data['value']) && isset($cookie_data['expire'])){            if(time()<$cookie_data['expire']){ // 未到期                return array($cookie_data['value'], $cookie_data['expire']);            }        }        return array('', 0);    }    /** 加密/解密資料    * @param  String $str       原文或密文    * @param  String $operation ENCODE or DECODE    * @return String            根據設定返回明文活密文    */    private function authcode($string, $operation = 'DECODE'){        $ckey_length = 4;   // 隨機密鑰長度 取值 0-32;        $key = $this->_securekey;        $key = md5($key);        $keya = md5(substr($key, 0, 16));        $keyb = md5(substr($key, 16, 16));        $keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : '';        $cryptkey = $keya.md5($keya.$keyc);        $key_length = strlen($cryptkey);        $string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', 0).substr(md5($string.$keyb), 0, 16).$string;        $string_length = strlen($string);        $result = '';        $box = range(0, 255);        $rndkey = array();        for($i = 0; $i <= 255; $i++) {            $rndkey[$i] = ord($cryptkey[$i % $key_length]);        }        for($j = $i = 0; $i < 256; $i++) {            $j = ($j + $box[$i] + $rndkey[$i]) % 256;            $tmp = $box[$i];            $box[$i] = $box[$j];            $box[$j] = $tmp;        }        for($a = $j = $i = 0; $i < $string_length; $i++) {            $a = ($a + 1) % 256;            $j = ($j + $box[$a]) % 256;            $tmp = $box[$a];            $box[$a] = $box[$j];            $box[$j] = $tmp;            $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));        }        if($operation == 'DECODE') {            if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {                return substr($result, 26);            } else {                return '';            }        } else {            return $keyc.str_replace('=', '', base64_encode($result));        }    }} // class end?>

demo.php

<?phprequire 'Cookies.class.php';$type = isset($_GET['type'])? strtolower($_GET['type']) : '';if(!in_array($type, array('set','get','update','clear'))){    exit('type not exists');}$obj = new Cookies('member', 10); // objswitch($type){    case 'set': // 設定        $data = array(            'name' => 'fdipzone',            'gender' => 'male'        );        $obj->set('me', $data, 5);        echo 'set cookies';        break;    case 'get': // 讀取        $result = $obj->get('me');        echo '<pre>';        print_r($result);        echo '</pre>';        echo 'get cookies';        break;    case 'update': // 更新        $data = array(            'name' => 'angelababy',            'gender' => 'female'        );        $flag = $obj->update('me', $data);        if($flag){            echo 'update cookies success';        }else{            echo 'update cookies false';        }        break;    case 'clear': // 清除        $obj->clear('me');        echo 'clear cookies';        break;}?>

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