php调用微信jssdk生成签名

api.php

<?php
function isAjax(){
    return isset($_SERVER['HTTP_X_REQUESTED_WITH']) &&strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest';
}
if(!isAjax()) exit;


// if(!isset($_SERVER["HTTP_REFERER"])) exit;
include_once('./config.php');
include_once('./lib/Weixin.class.php');

$url = urldecode($_GET["url"]);

$weixin = new Weinxin(APP_ID, APP_SECRET, DATA_PATH);
$sign = $weixin->create_signature($url);
echo $sign;

config.php

<?php
define('APP_ID', 'wxxxxxxxxxxxx');
define('APP_SECRET', '6b6xxxxxxxxxxxx');
define('DATA_PATH', './data/');

lib/Weixin.class.php

<?php

/**
 * Class Weixin
 * @description 微信公众平台获取accessToken以及jssdk签名的简易接口类
 * @author liveidzong@gmail.com
 * @url https://zongliwei.com
 * @usage 见api.php
 */
class Weinxin{

    const TOKEN_API = 'https://api.weixin.qq.com/cgi-bin/token';
    const TICKET_API = 'https://api.weixin.qq.com/cgi-bin/ticket/getticket';

    protected $app_id;
    protected $app_secret;
    protected $data_path;

    function __construct($app_id, $app_secret, $data_path){
        $this->app_id = $app_id;
        $this->app_secret = $app_secret;
        $this->data_path = $data_path;
    }

    public function get_time_stamp(){
        return (new DateTime('now'))->getTimestamp();
    }

    public function curl_http($url){
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_TIMEOUT, 500);
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
        $res = curl_exec($curl);
        return $res;
    }
    //返回数组
    public function get_access_token(){
        $now = $this->get_time_stamp();
        $paramArray = array(
           'grant_type' => 'client_credential',
           'appid' => $this->app_id,
           'secret' => $this->app_secret
        );
        $url = self::TOKEN_API. '?' . http_build_query($paramArray);
        $result = json_decode($this->curl_http($url), true);
        if( isset($result['errcode'])) {
            return 0;
        }else{
            return array_merge($result, array('update_at' => $now));
        }
    }
    //返回数组
    public function get_jssdk_ticket() {
        $now = $this->get_time_stamp();
        $token = $this->get_access_token_from_local();
        $paramArray = array(
            'access_token' => $token['access_token'],
            'type' => 'jsapi'
        );
        $url = self:: TICKET_API . '?'. http_build_query($paramArray);
        $result = json_decode($this->curl_http($url), true);
        if($result['errcode']) {
            return 0;
        }else{
            return array_merge($result, array('update_at' => $now));
        }
    }
    
    //$url 从api中传过来, 返回json对象
    public function create_signature($url) {

       $timestamp = $this->get_time_stamp();
       $token_get = $this->get_access_token_from_local();
       $token = $token_get['access_token'];
       $ticket = $this->get_jssdk_ticket_from_local();
       $jssdk_ticket = $ticket['ticket'];
       $nonceStr = $this->get_random_str();
       $string = "jsapi_ticket=$jssdk_ticket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";
       $signature = sha1($string);
       $signPackage = array (
            "appId" => $this->app_id,
            "nonceStr" => $nonceStr,
            "timestamp" => $timestamp,
            "url" => $url,
            "signature" => $signature,
            "rawString" => $string,
            "ticket" => $jssdk_ticket,
            "token" => $token
        );
        //返回json对象
        return json_encode($signPackage);
    }

    //返回数组
    public function get_access_token_from_local() {
        $now = $this->get_time_stamp();
        $cache_path = $this->data_path . 'ACCESS_TOKEN.json';
        if(file_exists($cache_path)) {

            $cache = file_get_contents($cache_path);
            if($cache) {
                $cache = json_decode($cache, true);
                if($cache['update_at'] + $cache['expires_in'] > $now) {
                    return $cache;
                }else{
                    $latest_token = $this->get_access_token();
                    if($latest_token) {
                        $fp = fopen($cache_path,w);
                        //默认是fugai
                        fwrite($fp, json_encode($latest_token));
                        fclose($fp);
                        return $latest_token;
                    }else{
                        return 0;
                    }
                }
            }else{
                $latest_token = $this->get_access_token();
                if($latest_token) {
                    $fp = fopen($cache_path, w);
                    //默认是fugai
                    fwrite($fp, json_encode($latest_token));
                    fclose($fp);
                    return $latest_token;
                }else{
                    return 0;
                }
            } 
        }
      }


    public function get_jssdk_ticket_from_local(){
        $now = $this->get_time_stamp();
        $cache_path = $this->data_path . 'JSAPI_TICKET.json';
        if(file_exists($cache_path)) {
            $cache = file_get_contents($cache_path);
            if($cache) {
                $cache = json_decode($cache, true);
                if($cache['update_at'] + $cache['expires_in'] > $now) {
                    return $cache;
                }else{
                    echo $cache_path;
                    $latest_jsdsk_ticket = $this->get_jssdk_ticket();
                    if($latest_jsdsk_ticket) {
                        $fp = fopen($cache_path, w);
                        //默认是覆盖
                        fwrite($fp, json_encode($latest_jsdsk_ticket));
                        fclose($fp);
                        return $latest_jsdsk_ticket;
                    }else{
                        return 0;
                    }
                }
            }else{
                $latest_jsdsk_ticket = $this->get_jssdk_ticket();
                if($latest_jsdsk_ticket) {
                    $fp = fopen($cache_path, w);
                    //默认是覆盖
                    fwrite($fp, json_encode($latest_jsdsk_ticket));
                    fclose($fp);
                    return $latest_jsdsk_ticket;
                }else{
                    return 0;
                }
            }
           
        }
    }


    public function get_random_str() {
        $str = "";
        $str_pol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
        $max = strlen($str_pol) - 1;
        for ($i = 0; $i < 16; $i++) {
            $str .= $str_pol[mt_rand(0, $max)];
        }
        return $str;
    }
}

本文由 dealdot ＜dealdot＃163.com＞ 创作, Full Stack Developer @ DeepBlue
本文最后编辑时间为: May 14, 2021 at 19:11 pm
转载请注明来源