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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:
<?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: *publicset设置cookie *publicget读取cookie *publicupdate 更新cookie *publicclear 清除cookie *publicsetPrefix 设置前缀 *publicsetExpire 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 startprivate $_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 $namecookie 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 $namecookie name * @return mixed cookie value */ public function get($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 $namecookie 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 $namecookie name */ public function clear($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:
<?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"); }$obj = new Cookies("member", 10); // objswitch($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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希望本文所述对大家的PHP程序设计有所帮助。