how to upload file using curl with PHP

Question

I want to know how to upload file using cURL or anything else in PHP. I have searched in google many times but no results.

In other words, the user sees a file upload button on a form, the form gets posted to my php script, then my php script needs to re-post it to another script (eg on another server).

I have this code to receive the file and upload it

code :

echo"".$_FILES['userfile']."";
$uploaddir = './';
$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);
if ( isset($_FILES["userfile"]) ) {
    echo '<p><font color="#00FF00" size="7">Uploaded</font></p>';
    if (move_uploaded_file
($_FILES["userfile"]["tmp_name"], $uploadfile))
echo $uploadfile;
    else echo '<p><font color="#FF0000" size="7">Failed</font></p>';
}

I want the code to send the file to receiver file.

Solution

Use:

if (function_exists('curl_file_create')) { // php 5.5+
  $cFile = curl_file_create($file_name_with_full_path);
} else { // 
  $cFile = '@' . realpath($file_name_with_full_path);
}
$post = array('extra_info' => '123456','file_contents'=> $cFile);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$target_url);
curl_setopt($ch, CURLOPT_POST,1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
$result=curl_exec ($ch);
curl_close ($ch);

You can also refer:

http://blog.derakkilgo.com/2009/06/07/send-a-file-via-post-with-curl-and-php/

Important hint for PHP 5.5+:

Now we should use https://wiki.php.net/rfc/curl-file-upload but if you still want to use this deprecated approach then you need to set curl_setopt($ch, CURLOPT_SAFE_UPLOAD, false);

Comments

[Hadidi44]

thanks but how to upload it in different name like the file name is x.php and i want to upload it with z.php name

[karthik]

In the about example "sample" is the name. you can access the data using $_FILES['sample'] so you can pass x.php and retrieve using $_FILES['x']

[m3nda]

Maybe, is a better way use the built-in feature from curl: php.net/manual/es/function.curl-file-create.php. Of course, you can use the way of POSTFIELDS and fill the value prepending with @. Anyway, the asnwer is copied from a custom usage of curl from a blog. The correct answer is say that the @ char defines it as a file, not a var. $post will contain @filename.jpg by example.

[Jeremy Logan]

@erm3nda That's PHP 5.5+ only.

[Marek Roj]

@fiXedd im currently using php 5.6, and using curl_file_create is required (the sollution provided by karthik is not working). So the code should be upgraded to something like this: if function_exists('curl_file_create')) { $cFile = curl_file_create($dest); } else { $cFile = '@' . realpath($dest); }

[Alan H]

Now we should use wiki.php.net/rfc/curl-file-upload but if you still want to use this deprecated approach then you need to set curl_setopt($ch, CURLOPT_SAFE_UPLOAD, false);

[Aaron Gillion]

What is extra_info => 123456 used for?

[Michał Fraś]

this solution stopped working in php 5.6, the solution is in adding file as: new CURLFile(realpath($fileName));

[serghei]

@MarekRoj You make my day

[gouchaoer]

CURLOPT_SAFE_UPLOAD is not supported for php7

[hanshenrik]

but if you still want to use this deprecated approach then you need to set curl_setopt($ch, CURLOPT_SAFE_UPLOAD, false); - this won't work as of PHP 7.0

[Pooja Jadav]

This code though, I can't get file content

[Benyamin Limanto]

The RFC should be the answer for it. Thanks for providing clue here.