本文实例讲述了PHP实现的Cookies操作类及其用法，分享给大家供大家参考。具体分析如下：

一、功能：

1.保存，读取，更新，清除cookies数据。

2.可设置前缀。

3.强制超时控制。

4.cookies数据可以是字符串，数组，对象等。

二、用法：

Cookies.class.php类文件如下：

?123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250 <?php /** Cookies class 保存,读取,更新,清除cookies数据。可设置前缀。强制超时。数据可以是字符串,数组,对象等。 * Date: 2013-12-22 * Author: fdipzone * Ver: 1.0 * * Func: * public set 设置cookie * public get 读取cookie * public update 更新cookie * public clear 清除cookie * public setPrefix 设置前缀 * public setExpire 设置过期时间 * private authcode 加密/解密 * private pack 将数据打包 * private unpack 将数据解包 * private getName 获取cookie name,增加prefix处理 */ 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 过期时间 * @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; } } /** 设置cookie * @param String $name cookie name * @param mixed $value cookie value 可以是字符串,数组,对象等 * @param int $expire 过期时间 */ public function set($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', $this->_securekey); if($cookie_name && $cookie_value && $cookie_expire){ setcookie($cookie_name, $cookie_value, $cookie_expire); } } /** 读取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', $this->_securekey); $cookie_value = $this->unpack($cookie_value); return isset($cookie_value[0])? $cookie_value[0] : null; }else{ return null; } } /** 更新cookie,只更新内容,如需要更新过期时间请使用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', $this->_securekey); $old_cookie_value = $this->unpack($old_cookie_value); if(isset($old_cookie_value[1]) && $old_cookie_vlaue[1]>0){ // 获取之前的过期时间 $cookie_expire = $old_cookie_value[1]; // 更新数据 $cookie_value = $this->pack($value, $cookie_expire); $cookie_value = $this->authcode($cookie_value, 'ENCODE', $this->_securekey); if($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); } /** 设置前缀 * @param String $prefix cookie prefix */ public function setPrefix($prefix){ if(is_string($prefix) && $prefix!=''){ $this->_prefix = $prefix; } } /** 设置过期时间 * @param int $expire cookie expire */ public function setExpire($expire){ if(is_numeric($expire) && $expire>0){ $this->_expire = $expire; } } /** 获取cookie name * @param String $name * @return String */ private function getName($name){ return $this->_prefix? $this->_prefix.'_'.$name : $name; } /** pack * @param Mixed $data 数据 * @param int $expire 过期时间 用于判断 * @return */ private function pack($data, $expire){ if($data===''){ return ''; } $cookie_data = array(); $cookie_data['value'] = $data; $cookie_data['expire'] = $expire; return json_encode($cookie_data); } /** unpack * @param Mixed $data 数据 * @return array(数据,过期时间) */ private function unpack($data){ if($data===''){ return array('', 0); } $cookie_data = json_decode($data, true); if(isset($cookie_data['value']) && isset($cookie_data['expire'])){ if(time()<$cookie_data['expire']){ // 未过期 return array($cookie_data['value'], $cookie_data['expire']); } } return array('', 0); } /** 加密/解密数据 * @param String $str 原文或密文 * @param String $operation ENCODE or DECODE * @return String 根据设置返回明文活密文 */ private function authcode($string, $operation = 'DECODE'){ $ckey_length = 4; // 随机密钥长度 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示例程序如下：

?1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253 <?php require 'Cookies.class.php'; $type = isset($_GET['type'])? strtolower($_GET['type']) : ''; if(!in_array($type, array('set','get','update','clear'))){ exit('type not exists'); } $obj = new Cookies('member', 10); // obj switch($type){ case 'set': // 设置 $data = array( 'name' => 'fdipzone', 'gender' => 'male' ); $obj->set('me', $data, 5); echo 'set cookies'; break; case 'get': // 读取 $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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