PHP微信JSSDK签名示例

<?php

namespace weisoft;

use think\Db;

class JSSDK

{

private $appId = '';

private $appSecret = '';

public function __construct($appId, $appSecret) {

$this->appId = $appId;

$this->appSecret = $appSecret;

}

function getSignPackage()

{

// 获取token

$token_data = file_get_contents($_SERVER["DOCUMENT_ROOT"].'/uploads/wechat_token.txt');

if (!empty($token_data)) {

$token_data = json_decode($token_data, true);

}

$time = time() - @$token_data['time'];

if ($time > 3600) {

$token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->appId."&secret=".$this->appSecret;

$token_res = $this->https_request($token_url);

$token_res = json_decode($token_res, true);

$token = $token_res['access_token'];

$data = array(

'time' => time(),

'token' => $token

);

$res = file_put_contents($_SERVER["DOCUMENT_ROOT"].'/uploads/wechat_token.txt', json_encode($data));

if ($res) {

echo '更新 token 成功';

}

} else {

$token = $token_data['token'];

}

$ticket_data = file_get_contents($_SERVER["DOCUMENT_ROOT"].'/uploads/wechat_ticket.txt');

if (!empty($ticket_data)) {

$ticket_data = json_decode($ticket_data, true);

}

$time = time() - @$ticket_data['time'];

if ($time > 3600) {

$ticket_url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=".$token."&type=jsapi";

$ticket_res = $this->https_request($ticket_url);

$ticket_res = json_decode($ticket_res, true);

$ticket = $ticket_res['ticket'];

$data = array(

'time' => time(),

'ticket' => $ticket

);

$res = file_put_contents($_SERVER["DOCUMENT_ROOT"].'/uploads/wechat_ticket.txt', json_encode($data));

if ($res) {

echo '更新 ticket 成功';

}

} else {

$ticket = $ticket_data['ticket'];

}

$timestamp = time();

$nonceStr =$this->createNonceStr();

$url = empty(input('post.url'))?"http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]":input('post.url','',null);

$str = "jsapi_ticket={$ticket}&noncestr={$nonceStr}&timestamp={$timestamp}&url={$url}";

$signature = sha1($str);

$signPackage = array(

"appId" => $this->appId,

"jsapi_ticket"=>$ticket,

"nonceStr" => $nonceStr,

"timestamp" => $timestamp,

"url" => $url,

"signature" => $signature

);

return json($signPackage);

}

function createNonceStr($length = 16) {

$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

$str = "";

for ($i = 0; $i < $length; $i++) {

$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);

}

return $str;

}

/**

* 模拟 http 请求

* @param String $url 请求网址

* @param Array $data 数据

function https_request($url, $data = null){

// curl 初始化

$curl = curl_init();

// curl 设置

curl_setopt($curl, CURLOPT_URL, $url);

curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);

curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);

// 判断 $data get or post

if ( !empty($data) ) {

curl_setopt($curl, CURLOPT_POST, 1);

curl_setopt($curl, CURLOPT_POSTFIELDS, $data);

}

curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

// 执行

$res = curl_exec($curl);

curl_close($curl);

return $res;

}