scope参数错误或没有scope权限

function OAuthWeixin($callback) {
	$isWeixinBrowser = isWeixinBrowser ();
	$info = get_token_appinfo ();
	if (! $isWeixinBrowser || empty ( $info ['appid'] )) {
		redirect ( $callback . '&openid=-1' );
	}
	$param ['appid'] = $info ['appid'];
	//dump($_GET ['state']);exit;
	//$_GET ['getOpenId']=1;
	if (! isset ( $_GET ['getOpenId'] ) && $info['type']==1) { //修复订阅号 服务号判断权限bug
		$param ['redirect_uri'] = $callback . '&getOpenId=1';
		$param ['response_type'] = 'code';
		$param ['scope'] = 'snsapi_base';
		$param ['state'] = 123;
		$url = 'https://open.weixin.qq.com/connect/oauth2/authorize?' . http_build_query ( $param ) . '#wechat_redirect';
		redirect ( $url );
	} elseif ($_GET ['state']) {
		$param ['secret'] = $info ['secret'];
		$param ['code'] = I ( 'code' );
		$param ['grant_type'] = 'authorization_code';
		
		$url = 'https://api.weixin.qq.com/sns/oauth2/access_token?' . http_build_query ( $param );
		$content = file_get_contents ( $url );
		$content = json_decode ( $content, true );
		redirect ( $callback . '&openid=' . $content ['openid'] );
	}
}