微信access_token请求之简单缓存方法封装

还有东西要搞,就直接上代码

function.php

<?php
// 一个好玩的 curl 类
// https://github.com/metowolf/Meting/blob/master/src/Meting.php
// curl 方法请求 url
function https_request($url,$data)
{
    // 初始化
    $ch = curl_init();
    // 设置
    curl_setopt($ch,CURLOPT_URL,$url);
    // 检查ssl证书
    curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
    // 从检查本地证书检查是否ssl加密
    curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,$url);

    if ( !empty($data) ) {
            curl_setopt($ch,CURLOPT_POST,1);// 开启post
            curl_setopt($ch,CURLOPT_POSTFIELDS,$data);// 发送post $data

    }
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

    $res = curl_exec($ch);
    curl_close($ch); // close curl res
    return $res;
}

function __autoload($className)
{
    if ( file_exists('./Controller/'.$className.'.php')) {
        include './Controller/'.$className.'.php';
    }
}

 ?>

Token.php

<?php

/**
* token
*/
class Token
{
    public static $tokenFile = './token.txt';
    public static $tokenExpireTime = '3600';

    // 入口方法获取token
    public static function getToken()
    {
        // 先查缓存,  没有,再去请求
        if ( !self::checkTokenFileExists() || self::checkTokenFileExpire() ) {
            // 不存在 要重新请求
            // 过期 也要重新请求
            $token = self::request_token();
            // 更新缓存
            self::write_token($token);
            return $token;
        }else{
            // 缓存合法
            // 读取缓存
            return self::read_token();

        }

    }

    public static function write_token($token)
    {
        file_put_contents(self::$tokenFile,$token);
    }
    public static function read_token()
    {
        return file_get_contents(self::$tokenFile);
    }

    public static function request_token()
    {
        $url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wx199e07a40f2b94e7&secret=080b6aa95c137c95e1fb61c7eebfa0b2';
        // 发起 get
        $res = https_request($url);
        $data = json_decode($res,true);
        $token = $data['access_token'];
        // var_dump($token);
        return $token;
    }

    public static function checkTokenFileExists()
    {
        return file_exists(self::$tokenFile);
    }
    // 返回过期
    public static function checkTokenFileExpire()
    {

         return filemtime(self::$tokenFile) + self::$tokenExpireTime < time();
    }

}

 ?>