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<?php
namespace LaneWeChat\Core;
class AccessToken{
public static function getAccessToken(){
$accessToken = self::_checkAccessToken();
if($accessToken === false){
$accessToken = self::_getAccessToken();
}
return $accessToken['access_token'];
}
private static function _getAccessToken(){
$url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid='.WECHAT_APPID.'&secret='.WECHAT_APPSECRET;
$accessToken = Curl::callWebServer($url, '', 'GET');
if(!isset($accessToken['access_token'])){
return Msg::returnErrMsg(MsgConstant::ERROR_GET_ACCESS_TOKEN, '获取ACCESS_TOKEN失败');
}
$accessToken['time'] = time();
$accessTokenJson = json_encode($accessToken);
$f = fopen('access_token', 'w+');
fwrite($f, $accessTokenJson);
fclose($f);
return $accessToken;
}
private static function _checkAccessToken(){
$data = file_get_contents('access_token');
$accessToken['value'] = $data;
if(!empty($accessToken['value'])){
$accessToken = json_decode($accessToken['value'], true);
if(time() - $accessToken['time'] < $accessToken['expires_in']-10){
return $accessToken;
}
}
return false;
}
}