classJSSDK

{private $appId;private $appSecret;public function __construct($appId, $appSecret)

{$this->appId = $appId;$this->appSecret = $appSecret;

}public functiongetSignPackage()

{$jsapiTicket = $this->getJsApiTicket();//注意 URL 一定要動態獲取，不能 hardcode.

$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";$url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";$timestamp = time();$nonceStr = $this->createNonceStr();//這里參數的順序要按照 key 值 ASCII 碼升序排序

$string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";$signature = sha1($string);$signPackage = array("appId" => $this->appId,

"nonceStr" => $nonceStr,

"timestamp" => $timestamp,

"url" => $url,

"signature" => $signature,

"rawString" => $string);return $signPackage;

}private 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;

}private functiongetJsApiTicket()

{//jsapi_ticket 應該全局存儲與更新，以下代碼以寫入到文件中做示例

$data = json_decode($this->get_php_file("jsapi_ticket.php"));if ($data->expire_time < time()) {$accessToken = $this->getAccessToken();echo "access_token=" . $accessToken;//如果是企業號用以下 URL 獲取 ticket

//$url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken";

$url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";$res = json_decode($this->httpGet($url));$ticket = $res->ticket;if ($ticket) {$data->expire_time = time() + 7000;$data->jsapi_ticket = $ticket;$this->set_php_file("jsapi_ticket.php", json_encode($data));

}

}else{$ticket = $data->jsapi_ticket;

}return $ticket;

}private functiongetAccessToken()

{//access_token 應該全局存儲與更新，以下代碼以寫入到文件中做示例

$data = json_decode($this->get_php_file("access_token.php"));if ($data->expire_time < time()) {//如果是企業號用以下URL獲取access_token

//$url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret";

$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";$res = json_decode($this->httpGet($url));//var_dump($this->appId);

$access_token = $res->access_token;if ($access_token) {$data->expire_time = time() + 7000;$data->access_token = $access_token;$this->set_php_file("access_token.php", json_encode($data));

}

}else{$access_token = $data->access_token;

}return $access_token;

}private function httpGet($url)

{$curl =curl_init();

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

curl_setopt($curl, CURLOPT_TIMEOUT, 500);//為保證第三方服務器與微信服務器之間數據傳輸的安全性，所有微信接口采用https方式調用，必須使用下面2行代碼打開ssl安全校驗。

// 如果在部署過程中代碼在此處驗證失敗，請到 http://curl.haxx.se/ca/cacert.pem 下載新的證書判別文件。

curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);

curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);

curl_setopt($curl, CURLOPT_URL, $url);$res = curl_exec($curl);

curl_close($curl);return $res;

}private function get_php_file($filename)

{return trim(substr(@file_get_contents($_SERVER['DOCUMENT_ROOT'] . '/customers/' . $filename), 15));

}private function set_php_file($filename, $content)

{$fp = @fopen($_SERVER['DOCUMENT_ROOT'] . '/customers/' . $filename, "w+");fwrite($fp, "<?php exit();?>" . $content);fclose($fp);

}

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