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:
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,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[$cookie_name],$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,$this->_securekey); if($cookie_name && $cookie_value && $cookie_expire){ setcookie($cookie_name,$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,16));
$keyb = md5(substr($key,16,16));
$keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string,$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.$keyb),16).$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,10) == 0 || substr($result,10) - time() > 0) && substr($result,10,16) == substr(md5(substr($result,26).$keyb),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:
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;
}
?>
本文完整实例源码点击此处。
希望本文所述对大家的PHP程序设计有所帮助。
原文链接:https://www.f2er.com/php/23771.html