PHP curl error: curl__errno() returns error code 6

When I used curl to call the interface to obtain data, curl_errno() returned the error code '6'. Baidu looked it up

<code>CURLE_COULDNT_RESOLVE_HOST (6)
Couldn't resolve host. The given remote host was not resolved.</code>

It turns out that the program can normally obtain the data returned by the interface. This situation occurred suddenly. I wonder if the API restricts the call? I don’t know the specific solution yet. If you encounter the same situation, you can share the solution. Thank you.
PS: The data can be obtained directly by accessing the interface url in the browser.
curl code:

<code>public function getApiDataWithCurl($params = array()){
        $doc = array(
            'result'=>0,
            'content'=>'',
        );
        if(!isset($params['feed_id'])) return $doc;
        if(!isset($params['apikey'])) return $doc;
        $getUrl = $this->apiUrl.'?';
        foreach($params as $k => $v){
            if($v != ''){
                $getUrl .=$k.'='.$v.'&';
            }
        }
        $getUrl = substr($getUrl,0,strlen($getUrl)-1);

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL,$getUrl);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_HEADER, false);
        $response_content = curl_exec($ch);
        $error_code = curl_errno($ch);
        $curl_info = curl_getinfo($ch);
        curl_close($ch);
        $response_content = simplexml_load_string($response_content);
        $json = json_encode($response_content);
        $response_content = json_decode($json,TRUE);
        if($error_code || (!$response_content && $curl_info['http_code']!=200)){
            return 'CURL ERROR: error code '.$error_code;
        }else{
            $doc = array(
                'result'=>1,
                'content'=>$response_content,
            );
            return $doc;
        }
    }</code>

Reply content:

When I used curl to call the interface to obtain data, curl_errno() returned the error code '6'. Baidu looked it up

<code>CURLE_COULDNT_RESOLVE_HOST (6)
Couldn't resolve host. The given remote host was not resolved.</code>

It turns out that the program can normally obtain the data returned by the interface. This situation occurred suddenly. I wonder if the API restricts the call? I don’t know the specific solution yet. If you encounter the same situation, you can share the solution. Thank you.
PS: The data can be obtained directly by accessing the interface url in the browser.
curl code:

<code>public function getApiDataWithCurl($params = array()){
        $doc = array(
            'result'=>0,
            'content'=>'',
        );
        if(!isset($params['feed_id'])) return $doc;
        if(!isset($params['apikey'])) return $doc;
        $getUrl = $this->apiUrl.'?';
        foreach($params as $k => $v){
            if($v != ''){
                $getUrl .=$k.'='.$v.'&';
            }
        }
        $getUrl = substr($getUrl,0,strlen($getUrl)-1);

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL,$getUrl);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_HEADER, false);
        $response_content = curl_exec($ch);
        $error_code = curl_errno($ch);
        $curl_info = curl_getinfo($ch);
        curl_close($ch);
        $response_content = simplexml_load_string($response_content);
        $json = json_encode($response_content);
        $response_content = json_decode($json,TRUE);
        if($error_code || (!$response_content && $curl_info['http_code']!=200)){
            return 'CURL ERROR: error code '.$error_code;
        }else{
            $doc = array(
                'result'=>1,
                'content'=>$response_content,
            );
            return $doc;
        }
    }</code>

This is a problem of being unable to resolve the domain name. Try typing out the URL and see if you can ping it

Can you post curl

Look, this is a GET value request! You can try using file_get_content directly! Has the other party set up a whitelist?