cookie

1. js 设置 cookie

        
            //name=value 必须 
            //特殊字符（空格），需要编码 ncodeURIComponent(name) encodeURIComponent(value)
            //当天24点 new Date(new Date().setHours(24,0,0,0)).toUTCString()
            //一天 (new Date(Date.now() + 86400e3)).toUTCString()
            document.cookie = "name=value; path=/; expires=(new Date(Date.now() + 86400e3)).toUTCString()||max-age=3600*24; domain=site.com";
            //一天后过期
        
    

2. js 获取 cookie

        
            let cookieText = document.cookie.replace(/;\s*/g, '&');
            let cookie = new URLSearchParams(cookieText);
            cookie.get('name');

            //也可以
            function getCookie(name) {
                let matches = document.cookie.match(new RegExp(
                  "(?:^|; )" + name.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + "=([^;]*)"
                ));
                return matches ? decodeURIComponent(matches[1]) : undefined;
            }
        
    

3. js 删除 cookie

        
            document.cookie = "name=value; max-age=0";
        
    

4. php 设置 cookie

        
            //setcookie() 函数必须位于 html 标签之前。
            setcookie(name, value, expire, path, domain);
            setcookie("name", "value", time() + 60*60*24);
        
    

5. php 获取 cookie

        
            $_COOKIE["name"]
        
    

6. 删除 cookie

        
            setcookie("user", "", time()-1);