PHP cURL passing an array to CURLOPT_POSTFIELDS

Question

I have the following cURL PHP function that works correctly

curl_setopt_array($curl, array(
    CURLOPT_URL => "http://example.com/api",
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => "POST",
    CURLOPT_POSTFIELDS =>  "------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"api\"\r\n\r\n123344\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW--",
    CURLOPT_HTTPHEADER => array(
        "cache-control: no-cache",
        "content-type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW"
    ),
));

I would like to build the CURLOPT_POSTFIELDS by hand so have tried to pass an array instead like so...

$data = array('api'=>'123344');
curl_setopt_array($curl, array(
    CURLOPT_URL => "http://example.com/api",
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => "POST",
    CURLOPT_POSTFIELDS =>  $data,
    CURLOPT_HTTPHEADER => array(
        "cache-control: no-cache",
        "content-type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW"
    ),
));

But this is not giving me any response, can anyone point out what I am doing wrong?

php.net/manual/en/function.curl-setopt.php: "If value is an array, the Content-Type header will be set to multipart/form-data." So don't do this yourself, let cURL handle it. — C3roe
– C3roe, Commented Aug 1, 2017 at 20:06
Thank you, I had read that but wrongly assumed I could leave it set manually. All working now — fightstarr20
– fightstarr20, Commented Aug 1, 2017 at 20:07

Henry Ecker · Accepted Answer · 2023-08-25 22:34:57Z

1

You can use also http_build_query() for your post data

CURLOPT_POSTFIELDS => http_build_query($data)

edited Aug 25, 2023 at 22:34

Henry Ecker♦

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answered Aug 1, 2017 at 20:08

MTK

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C3roe · Accepted Answer · 2017-08-01 20:10:11Z

0

http://php.net/manual/en/function.curl-setopt.php:

If value is an array, the Content-Type header will be set to multipart/form-data.

So don't do this yourself, let cURL handle it.

It knows how multipart/form-data works, and will create the request body including the boundaries for you.

answered Aug 1, 2017 at 20:10

C3roe

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