How to debug a get request in php using curl [duplicate]

Question

I'm trying to make a get request in php using curl. This is what I'm doing:

$curl = curl_init();

curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($curl, CURLOPT_USERPWD, "username:password");

curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

$result = curl_exec($curl);
curl_close($curl);

printf($result);

But $result doesn't print out anything, no success or failure message. I've successfully reached the endpoint via postman and in a web browser so I know it works. Printing out $curl prints: "Resource #1" which makes me think curl is properly installed on the server.

I'm not sure what steps to take next to make things work.

If you want to debug it then start with var_dump or var_export not printf. That at least will give you type as well as value so you know eg if you got a boolean back. — David Soussan
– David Soussan, Commented May 12, 2015 at 4:13
curl_error(). And make sure to turn on errors, error_reporting(E_ALL);. — Sverri M. Olsen
– Sverri M. Olsen, Commented May 12, 2015 at 4:20

Misunderstood · Accepted Answer · 2015-05-12 04:51:59Z

8

Add a few more option for troubleshooting purposes.

Check for an error response.

If no error, get the details:

curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
curl_setopt($ch, CURLOPT_TIMEOUT,10);
curl_setopt($ch, CURLOPT_FAILONERROR,true);
curl_setopt($ch, CURLOPT_ENCODING,"");

curl_setopt($ch, CURLOPT_VERBOSE, true);
curl_setopt($ch, CURLINFO_HEADER_OUT, true);
curl_setopt($ch, CURLOPT_HEADER, true);

$data = curl_exec($ch);
if (curl_errno($ch)){
    $data .= 'Retreive Base Page Error: ' . curl_error($ch);
}
else {
  $skip = intval(curl_getinfo($ch, CURLINFO_HEADER_SIZE)); 
  $head = substr($data,0,$skip);
  $data = substr($data,$skip);
  $info = curl_getinfo($ch);
  $info = var_export($info,true);
}
echo $head;
echo $info;

edited May 12, 2015 at 4:51

answered May 12, 2015 at 4:23

Misunderstood

5,6791 gold badge20 silver badges25 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

John Collins · Accepted Answer · 2021-11-27 07:05:02Z

0

You can utilize curl's CURLOPT_VERBOSE and CURLOPT_STDERR like this:

$curl = curl_init();

curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($curl, CURLOPT_USERPWD, "username:password");

curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

$verbose = fopen('php://temp', 'w+');
curl_setopt($curl, CURLOPT_VERBOSE, true);
curl_setopt($curl, CURLOPT_STDERR, $verbose);


$result = curl_exec($curl);
curl_close($curl);

rewind($verbose);
$verboseLog = stream_get_contents($verbose);
echo "Verbose information:\n<pre>", htmlspecialchars($verboseLog), "</pre>\n";



printf($result);

answered Nov 27, 2021 at 7:05

John Collins

891 silver badge9 bronze badges

Collectives™ on Stack Overflow

How to debug a get request in php using curl [duplicate]

2 Answers 2

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Linked

Related