你可以在前面加上@: $content = @file_get_contents($site);

这将抑制任何警告-谨慎使用!参见错误控制操作符

编辑:当你删除“http://'”时，你不再寻找一个网页，而是在你的磁盘上一个名为“www.google.....”的文件。

if (!file_get_contents($data)) {
  exit('<h1>ERROR MESSAGE</h1>');
} else {
      return file_get_contents($data);
}

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';
}

我是这样做的……不需要try-catch块…最好的解决方案总是最简单的……享受吧!

$content = @file_get_contents("http://www.google.com");
if (strpos($http_response_header[0], "200")) { 
   echo "SUCCESS";
} else { 
   echo "FAILED";
} 

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();
}

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;
    }