php send curl request and wait for the response

Question

I am sending a curl request to a server that needs a few seconds to process the request and spit out a response. I believe my php script is continuing on and not waiting, therefore my foreach loop based on the response is spitting out 0 results. How can i wait for the curl transaction to complete before moving on and processing data?

  $curl = curl_init();
  curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
  curl_setopt($curl, CURLOPT_USERPWD, "admin:password");
  curl_setopt($curl, CURLOPT_URL, "http://server/r/?dst_user__substr='user'");


  curl_setopt($curl, CURLOPT_VERBOSE, 1);
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
  $ret = curl_exec($curl);
  $result = json_decode($ret,true);

 <<<<I need to wait until transaction is complete here>>>>

  foreach ($result['data'] as $key => $value)
  {
        //process data from $result
  }

AFAIK, it will wait for a response before continuing running the script. — Fad
– Fad, Commented Nov 6, 2013 at 16:31
Try adding if ($ret===false) echo curl_error($curl); after the $ret = curl_exec... line - it could be that the command is timing out waiting for a response. — Clart Tent
– Clart Tent, Commented Nov 6, 2013 at 16:35

user399666 · Accepted Answer · 2013-11-06 16:37:53Z

24

curl is blocking, which means that:

$result = json_decode($ret,true);

foreach ($result['data'] as $key => $value)
{
      //process data from $result
}

won't execute until:

$ret = curl_exec($curl);

is complete. You can check for errors and other issues using curl_error() and by checking the HTTP response code with curl_getinfo().

answered Nov 6, 2013 at 16:37

user399666

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Shankar Narayana Damodaran · Accepted Answer · 2022-11-04 13:50:25Z

0

This is really weird ! , it shouldn't happen like what you are getting. But anyways try like this..

Get a httpresponse code and then check up...

$curl = curl_init();
  curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
  curl_setopt($curl, CURLOPT_USERPWD, "admin:password");
  curl_setopt($curl, CURLOPT_URL, "http://server/r/?dst_user__substr='user'");


  curl_setopt($curl, CURLOPT_VERBOSE, 1);
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
  $ret = curl_exec($curl);
  $httpcode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
  if($httpcode==200)
  {
  $result = json_decode($ret,true);
  foreach ($result['data'] as $key => $value)
  {
        //process data from $result
  }
  }

edited Nov 4, 2022 at 13:50

answered Nov 6, 2013 at 16:34

Shankar Narayana Damodaran

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