如何使用PHP中的现有子域cookie从子域读取主cookie [英] How to read main cookie from the sub domain with an existing sub domain cookie in PHP

问题描述

我需要为子网域使用主网域Cookie，而且同时存在子网域和主网域Cookie。

I need to use main domain cookies for my sub domains as with higher priority when both sub and main domain cookies exists.

问题是当我开启 sub.domain.com ，并且

• sub.domain.com


• .domain.com

PHP全域$ _COOKIE包含$ _COOKIE ['data'] =='sub .domain.com'
我想检查是否还有 .domain.com cookie并使用它。

The PHP global $_COOKIE contains $_COOKIE['data'] == 'sub.domain.com' I would like to check if there are also .domain.com cookie and use it.

如何

推荐答案

有$ _SERVER [ 'HTTP_COOKIE']变量，其中包含与一个大字符串同名的子域和主域cookie变量。在下一个简单代码中，$ cookie_variable数组将包含特定变量的两个值。

There is $_SERVER ['HTTP_COOKIE'] variable that contains both sub domain and main domain cookie variables with the same name as one large string. In next simple code $cookie_variable array will contain both values of specific variables..

    if( 'sub.domain.com' == $_SERVER['HTTP_HOST']) {
    $var_name = 'somedata';
    $domains_counter = 0;
    foreach(explode(';', $_SERVER['HTTP_COOKIE']) as $cookie_variable_string) {
        if( false !== strpos($cookie_variable_string, $var_name.'=') ) {
            $cookie_variable[$domains_counter] = urldecode(
trim(
substr(
$cookie_variable_string, 
strpos($cookie_variable_string, $var_name) + strlen($var_name.'=')
)
)
);
            $domains_counter++;
        }
    }
var_dump($cookie_variable);
}

创建的函数可获取所有变量：

Created function that gets all variables:

public static function get_http_cookie_variables()
{
    foreach(explode(';', $_SERVER['HTTP_COOKIE']) as $cookie_variable_string)
    {
        $key_value = explode('=', $cookie_variable_string);
        $cookie_var_name = trim($key_value[0]);
        if(is_null($domains_counter[$cookie_var_name]))
        {
            $domains_counter[$cookie_var_name] = 0;
        }
        $http_cookie_variables[$cookie_var_name][$domains_counter[$cookie_var_name]] = urldecode(trim($key_value[1]));
        $domains_counter[$cookie_var_name]++;
    }
    return $http_cookie_variables;
}

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