下面是我的处理方法:

$this->response_body = @file_get_contents($this->url, false, $context);
if ($this->response_body === false) {
    $error = error_get_last();
    $error = explode(': ', $error['message']);
    $error = trim($error[2]) . PHP_EOL;
    fprintf(STDERR, 'Error: '. $error);
    die();
}

您可以使用这个脚本

$url = @file_get_contents("http://www.itreb.info");
if ($url) {
    // if url is true execute this 
    echo $url;
} else {
    // if not exceute this 
    echo "connection error";
}

最好的方法是设置自己的错误和异常处理程序，这些处理程序将做一些有用的事情，如将其记录在文件中或通过电子邮件发送关键的错误和异常处理程序。 http://www.php.net/set_error_handler

这将尝试获取数据，如果它不起作用，它将捕获错误，并允许您在捕获范围内执行所需的任何操作。

try {
    $content = file_get_contents($site);
} catch(\Exception $e) {
    return 'The file was not found';
}

第一步:检查返回代码:if($content === FALSE){//处理错误这里…｝

第二步:通过在file_get_contents()调用前放置一个错误控制操作符(即@)来抑制警告: $content = @file_get_contents($site);

我解决了所有的问题，这是工作的所有环节

public function getTitle($url)
    {
        try {
            if (strpos($url, 'www.youtube.com/watch') !== false) {
                $apikey = 'AIzaSyCPeA3MlMPeT1CU18NHfJawWAx18VoowOY';
                $videoId = explode('&', explode("=", $url)[1])[0];
                $url = 'https://www.googleapis.com/youtube/v3/videos?id=' . $videoId . '&key=' . $apikey . '&part=snippet';

                $ch = curl_init();

                curl_setopt($ch, CURLOPT_HEADER, 0);
                curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
                curl_setopt($ch, CURLOPT_URL, $url);
                curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
                curl_setopt($ch, CURLOPT_VERBOSE, 0);
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
                $response = curl_exec($ch);
                curl_close($ch);

                $data = json_decode($response);
                $value = json_decode(json_encode($data), true);

                $title = $value['items'][0]['snippet']['title'];
            } else {
                set_error_handler(
                    function () {
                            return false;
                    }
                );
                if (($str = file_get_contents($url)) === false) {
                    $title = $url;
                } else {
                    preg_match("/\<title\>(.*)\<\/title\>/i", $str, $title);
                    $title = $title[1];
                    if (preg_replace('/[\x00-\x1F\x7F-\xFF]/', '', $title))
                        $title = utf8_encode($title);
                    $title = html_entity_decode($title);
                }
                restore_error_handler();
            }
        } catch (Exception $e) {
            $title = $url;
        }
        return $title;
    }