apache php curl访问htts时出现SSL certificate problem unable to get local issuer certificate的解决方法

apache php 开发微信公众号， curl 下载语音，图片，视频 是https 开头的。遇到curl_init() 返回 bool(false)。就是这个问题。
PHP通过cURL访问https时出现SSL certificate problem: unable to get local issuer certificate的解决方法：只要设置以下两个属性就可以解决。
将 CURLOPT_SSL_VERIFYPEER 设置为 false,
将 CURLOPT_SSL_VERIFYHOST 设置为 false.
代码如下:

function saveImg($url)
    {
        $ch = curl_init($url);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_NOBODY, 0);    //对body进行输出。
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $package = curl_exec($ch);
        $httpinfo = curl_getinfo($ch);

        curl_close($ch);
        $media = array_merge(array('mediaBody' => $package), $httpinfo);

        //文件格式
        preg_match('/\w\/(\w+)/i', $media["content_type"], $extmatches);
        $fileExt = $extmatches[1];
        $filename = $this->com_create_guid() . $this->get_total_millisecond() . ".{$fileExt}";
        $dirname = public_path() .DIRECTORY_SEPARATOR. "uploads".DIRECTORY_SEPARATOR."img".DIRECTORY_SEPARATOR;
        if (!file_exists($dirname)) {
            mkdir($dirname, 0777, true);
        }
        file_put_contents($dirname . $filename, $media['mediaBody']);
        return $filename;
    }