PHP文件\u获取\u内容

Question

PHP/Apache2中的文件获取内容是从Facebook获取用户图片。直到最近，它一直运转良好。现在，它总是在一分钟后超时，在我的Apache2 error.log中有以下错误：

PHP警告：文件\u获取\u内容(https://graph.facebook.com/999999999/picture?width=200)：无法打开流：连接超时

下面是代码（我最近添加了$context以查看它是否能正常工作，但没有）：

$context = stream_context_create(array('https' => array('header'=>'Connection: close\r\n')));
$fbprofileimage = file_get_contents('https://graph.facebook.com/'.$id.'/picture?width=100',false,$context);

我试过卷曲，但不起作用：

$curl_handle=curl_init();
curl_setopt($curl_handle, CURLOPT_URL,'http://graph.facebook.com/'.$id.'/picture?width=100');
curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT, 2);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_USERAGENT, 'StockBet');
$fbprofileimage = curl_exec($curl_handle);
curl_close($curl_handle);

我发现了那个文件的内容

以下工作：

$context = stream_context_create(array('https' => array('header'=>'Connection: close\r\n')));
$fbprofileimage = file_get_contents('https://fm.cnbc.com/applications/cnbc.com/resources/img/editorial/2017/08/03/104629909-GettyImages-630953738-bitcoin.240x160.jpg?v=1501760634',false,$context);

$curl_handle=curl_init();
curl_setopt($curl_handle, CURLOPT_URL,'https://fm.cnbc.com/applications/cnbc.com/resources/img/editorial/2017/08/03/104629909-GettyImages-630953738-bitcoin.240x160.jpg?v=1501760634');
curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT, 2);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_USERAGENT, 'StockBet');
$fbprofileimage = curl_exec($curl_handle);
curl_close($curl_handle);

上述代码还可以获取以下图像文件：

• https://b.thumbs.redditmedia.com/SSGv_d2P6ymZVIq8Bm5IVqpcz6WZioCfbRh5rxMPcTc.jpg（Reddit）
• https://try.alexa.com/wp-content/uploads/2017/01/alexa-logo.png
• https://ir.ebaystatic.com/rs/v/fxxj3ttftm5ltcqnto1o4baovyl.png
  （eBay）
• https://images-na.ssl-images-amazon.com/images/G/01/Gateway/Unrec/T2/Amazon_GW_DesktopShoveler_5_200x200.CB503347722.png
• https://bitcointalk.org/useravatars/avatar_7110.jpghttps://try.alexa.com/wp-content/uploads/2017/01/alexa-logo.png

上述代码无法获取以下图像文件：

• https://www.google.ca/images/branding/googlelogo/2x/googlelogo_color_120x44dp.png
• https://s.yimg.com/uu/api/res/1.2/7rUl71NcpOwqZeJexHuZhA--/Zmk9c3RyaW07aD0xOTM7cHlvZmY9MDtxPTk1O3c9MjIwO3NtPTE7YXBwaWQ9eXRhY2h5b24-/http：//media.zenfs.com/en-US/homerun/aol_com_127/ce17fc9999cd894bf3a3dac1416b3230（雅虎）
• https://c.disquscdn.com/next/a0cd712/marketing/assets/img/brand/disqus-logo-blue.svg（Disqus）
• https://pbs.twimg.com/profile_images/464794058229964800/uwlkErTI_bigger.png（推特）
• https://scontent-yyz1-1.xx.fbcdn.net/v/t45.1600-4/c0.31.284.149/p284x149/21337242_6083114387812_5783480223513182208_n.png?oh=3c78c007377ee96b844e91843dfdfddb

有人知道为什么我可以从一些网站得到图像文件，而不是其他的吗？

Answer 1

出于从Facebook获取用户图片的目的，我使用以下代码使其正常工作：

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);  // need confirmed
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);  // need confirmed.  I think this is key, as Facebook redirects to another URL and we need to follow
        //curl_setopt($ch, CURLOPT_ENCODING,"");  // not needed confirmed
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 1);  // need confirmed
        curl_setopt($ch, CURLOPT_TIMEOUT,1);  // need confirmed
        curl_setopt($ch, CURLOPT_FAILONERROR,true);  // not needed confirmed
        //curl_setopt($ch, CURLOPT_VERBOSE, true);  // not needed confirmed
        //curl_setopt($ch, CURLINFO_HEADER_OUT, true);  // not needed confirmed
        curl_setopt($ch, CURLOPT_HEADER, true);  // need confirmed
        $fbprofileimage = curl_exec($ch);   
        if (curl_errno($ch)){
            echo 'Retreive Base Page Error: ' . curl_error($ch);
        }
        else {
          //$info = rawurldecode(var_export(curl_getinfo($ch),true));
         // Get the cookies:
          $skip = intval(curl_getinfo($ch, CURLINFO_HEADER_SIZE)); 
          //$responseHeader= substr($fbprofileimage,0,$skip);
          $fbprofileimage= substr($fbprofileimage,$skip);    // need confirmed
          //echo "HEADER: $responseHeader\n";   // causes error
          //echo "\n\nINFO: $info\n\nDATA: $fbprofileimage";  // causes error
        }               

我认为关键在于：

curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); 

因为当你https://graph.facebook.com/999999999/picture?width=200 （其中999999999是用户的ID），Facebook重定向到另一个URL。