Cookie使用详解(针对Php和JavaScript)

Php存值，Js取值

//存值 PHP
setcookie('openid',$openid);

//取值 JavaScript
//未使用escape和unescape进行编解码
function getCookieWithoutUnescape(Name) {
    var search = Name + "="//查询检索的值
    var returnvalue = "";//返回值
    if (document.cookie.length > 0) {
        sd = document.cookie.indexOf(search);
        if (sd!= -1) {
            sd += search.length;
            end = document.cookie.indexOf(";", sd);
            if (end == -1)
                end = document.cookie.length;
            //unescape() 函数可对通过 escape() 编码的字符串进行解码。
            returnvalue=document.cookie.substring(sd, end)
        }
    }
    return returnvalue;
}

Js存值，Php取值（使用escape和unescape进行编解码）

//  存值  JavaScript
function setCookie(name, value) {
    var exp = new Date();
    exp.setTime(exp.getTime() + 100 * 1000);
    document.cookie = name + "=" + escape(value) + ";path=/;domain=.daxiangtravel.com";
    return true;
};

//取值 Php
$productName = $_COOKIE['title'];
$productName = CodeUtil::unescapeUtf8($productName);

class CodeUtil{
public static function unescapeUtf8($str){
        $ret = '';
        $len = strlen($str);
        for ($i = 0; $i < $len; $i++){
            if ($str[$i] == '%' && $str[$i+1] == 'u'){
                $val = hexdec(substr($str, $i+2, 4));
                if ($val < 0x7f) $ret .= chr($val);
                else if($val < 0x800) $ret .= chr(0xc0|($val>>6)).chr(0x80|($val&0x3f));
                else $ret .= chr(0xe0|($val>>12)).chr(0x80|(($val>>6)&0x3f)).chr(0x80|($val&0x3f));
                $i += 5;
            }
            else if ($str[$i] == '%'){
                $ret .= urldecode(substr($str, $i, 3));
                $i += 2;
            }
            else $ret .= $str[$i];
        }
        return $ret;
    }
}