php Cookies 操作类
Cookies 操作类
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。
Cookies.class.php
<?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");
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");
$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");
$old_cookie_value = $this->unpack($old_cookie_value);
if(isset($old_cookie_value[1]) && $old_cookie_value[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");
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
<?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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