How to Properly Post Raw Image Data as Multipart/Form-Data Using cURL in PHP?

Posting Raw Image Data as Multipart/Form-Data in Curl

When attempting to send an image as multipart/form-data using cURL in PHP, you may encounter issues if you are relying on the @$filePath variable within CURLOPT_POSTFIELDS.

Solution

As of PHP 5.6, the use of @$filePath in CURLOPT_POSTFIELDS is deprecated and requires setting CURLOPT_SAFE_UPLOAD. In PHP 7, it is no longer supported. To resolve this issue, you need to utilize a CurlFile object instead.

$fields = [
    'name' => new \CurlFile($filePath, 'image/png', 'filename.png')
];
curl_setopt($resource, CURLOPT_POSTFIELDS, $fields);
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