Curl post file PHP Notice: Array to string conversion

Question

Please tell me how to transfer a file using curl post without php warning that $ data_curl is an array PHP Notice: Array to string conversion...

$data_curl = array('domain' => $domain, 'token' => '*', 'files' => array());
foreach ($_FILES["files"]["tmp_name"] as $file) {
   $tmpfile = $_FILES['files']['tmp_name'][$i];
   $filename = $name_file."_".time().".".$type;
   $data_curl = $data_curl + array(
      'file'.$i => curl_file_create($tmpfile, $_FILES['files']['type'][$i], $filename)
   );
   $i++;    
} 
$ch = curl_init('https://google.com');
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_curl);
curl_exec($ch);

json_encode and http_build_query do not send file.

Learned something new then. If only we had the ACTUAL error message instead of a cropped one — hppycoder
– hppycoder, Commented Apr 5, 2021 at 15:13
@hppycoder I agree. The OP needs to show on which line the error is coming and what's inside those inputs from the user. — mighty_dev
– mighty_dev, Commented Apr 5, 2021 at 15:16
@hppycoder error in this line curl_setopt($ch, CURLOPT_POSTFIELDS, $data_curl); — Vector
– Vector, Commented Apr 5, 2021 at 15:18

mighty_dev · Accepted Answer · 2021-04-05 15:39:01Z

1

The reason why error pops up is because you have

$data_curl = array('files' => array());

The values cannot be arrays in themselves and rather just a string or an integer or floats or booleans with an exception of CURLFile objects .

Also, there is no point in sending files key as a POST param with no value inside it. So you could better remove it completely and just keep $data_curl = array();

answered Apr 5, 2021 at 15:39

mighty_dev

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4 Comments

Vector Over a year ago

How then can I pass some variables in the array?

mighty_dev Over a year ago

@Vector Can you edit your post with an example?

mighty_dev Over a year ago

@Vector Why do you still need 'files' => array() at the end?

Vector Over a year ago

Without 'files' => array () at the end works without warnings. Thanks! The question is closed.

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