PHP Curl获取服务器响应[重复]

问题描述：

Possible Duplicate:
Easy way to test a URL for 404 in PHP?

I am using curl to download a sequence of pdfs from the backend in PHP. I do not know when the sequence ends like 1.pdf, 2.pdf......etc.

Below is the code I am using to download pdf:

$url  = 'http://<ip>.pdf';
    $path = "C:\\test.pdf";

    $fp = fopen($path, 'w');

    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_FILE, $fp);

    $data = curl_exec($ch);

    fclose($fp);

But how do I determine that that pdf do not exists in the backend? Does curl returns any response when file not found?

Thanks In Advance

可能重复： strong>
在PHP中测试404的URL的简便方法？ blockquote>
我正在使用curl从PHP的后端下载一系列pdf。我不知道序列何时结束如1.pdf，2.pdf ......等。 p>

以下是我用来下载pdf的代码： p>

$ url ='http：//＆lt; ip＆gt; .pdf'; $ path =“C：\\ test.pdf”; $ fp = fopen（ $ path，'w'）; $ ch = curl_init（$ url）; curl_setopt（$ ch，CURLOPT_FILE，$ fp）; $ data = curl_exec（$ ch）; \ n fclose（$ fp）; code> pre> 但是如何确定后端中不存在该pdf？当找不到文件时，curl会返回任何响应吗？ p> 在此先感谢 p> div>

答

$ch=curl_init("www.example.org/example.pdf");
curl_setopt($ch,CURLOPT_HEADER,0);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$result=curl_exec($ch);
curl_close($ch);

with curl_setopt($ch,CURLOPT_RETURNTRANSFER,true); it will return the result on success, FALSE on failure.

with curl_setopt($ch,CURLOPT_RETURNTRANSFER,false); it will return TRUE on success or FALSE on failure.

Moreover, for file not found:

$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
if($http_code == 404)
{
  /*file not found*/
}

答

Just test the statut code of the http response after $data = curl_exec($ch);

$http_status = curl_getinfo($url, CURLINFO_HTTP_CODE);
if($http_status == '404') {

   //not found, -> file doesnt exist in your backend
}

More info here

PHP Curl获取服务器响应[重复]

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