简单的cURL不返回任何东西

Question

我试图在没有运气的情况下执行cURL。如果我访问网址：

http://webgis.dor.wa.gov/webapi/addressrates.aspx?output=xml&addr=416+Sid+Snyder+Ave+SW&city=Olympia&zip=98504

然后我可以看到一个XML文档。

但是，使用PHP5.6时，不会返回任何内容。特别是，我使用了以下代码：

<?php 

$ch = curl_init("http://webgis.dor.wa.gov/webapi/addressrates.aspx?output=xml&addr=416+Sid+Snyder+Ave+SW&city=Olympia&zip=98504");

  curl_setopt_array($ch,array(
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_TIMEOUT => 10
  ));
 $result = curl_exec($ch);
 if(!$result)
{
    echo 'Curl error: ' . curl_error($ch);
}

 $info = curl_getinfo($ch);
echo "Info: ";
print_r($info);
echo "Result: ";
var_dump($result);

其结果是：

 Info: array(26) { 
["url"]=> string(110) "http://webgis.dor.wa.gov/webapi/addressrates.aspx?output=xml&addr=416+Sid+Snyder+Ave+SW&city=Olympia&zip=98504" ["content_type"]=> string(8) "text/xml" 
["http_code"]=> int(200) 
["header_size"]=> int(236) 
["request_size"]=> int(141) 
["filetime"]=> int(-1) 
["ssl_verify_result"]=> int(0) 
["redirect_count"]=> int(0) 
["total_time"]=> float(0.654618) 
["namelookup_time"]=> float(0.004215) 
["connect_time"]=> float(0.064022) 
["pretransfer_time"]=> float(0.064091) 
["size_upload"]=> float(0) 
["size_download"]=> float(369) 
["speed_download"]=> float(369) 
["speed_upload"]=> float(0) 
["download_content_length"]=> float(369) 
["upload_content_length"]=> float(-1) 
["starttransfer_time"]=> float(0.654568) 
["redirect_time"]=> float(0) 
["redirect_url"]=> string(0) "" 
["primary_ip"]=> string(14) "198.105.130.18" 
["certinfo"]=> array(0) { } 
["primary_port"]=> int(80) 
["local_ip"]=> string(14) "162.244.253.84"
 ["local_port"]=> int(54442) }

 Result: string(369) "" 

Answer 1

就像这样，

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "http://webgis.dor.wa.gov/webapi/addressrates.aspx?output=xml&addr=416%20Sid%20Snyder%20Ave%20SW&city=Olympia&zip=98504",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => array(
    "cache-control: no-cache",
  ),
));

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {

  echo "cURL Error #:" . $err;

} else {

  echo $response;

 // convert it to array if you want
 $xml = simplexml_load_string($response);
 $json = json_encode($xml);
 $arr = json_decode($json,true);
 print '<pre>';
 print_r($arr);
 print '</pre>';

}

Answer 2

始终检查curl请求是否成功。别以为它成功了。

if(curl_exec($ch) === false)
{
    echo 'Curl error: ' . curl_error($ch);
}
else
{
    echo 'Operation completed without any errors';
}