how to upload file using curl with PHP

Question

How can I upload a file, either by using cURL or anything else, in PHP?

In other words, the user sees a file upload button on a form, the form gets posted to my PHO 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:

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>';
}

How can I send the file to the receiver server?

not with "ftp" , i want to send the file with curl in $_FILES['userfile'] — Hadidi44
– Hadidi44, Commented Mar 4, 2013 at 11:44
Uhm...what now? Where do you want to send it? What's your target system? — Till Helge
– Till Helge, Commented Mar 4, 2013 at 11:47

robsch · Accepted Answer · 2017-04-06 09:04:14Z

193

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);

edited Apr 6, 2017 at 9:04

robsch

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answered Mar 4, 2013 at 11:46

karthik

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14 Comments

m3nda Over a year ago

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 Over a year ago

@erm3nda That's PHP 5.5+ only.

Marek Roj Over a year ago

@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); }

Aaron Gillion Over a year ago

What is extra_info => 123456 used for?

Michał Fraś Over a year ago

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

|

8ctopus · Accepted Answer · 2023-04-10 08:06:33Z

For those using php >= 5.5, CURLFile can be used:

$curlFile = new \CURLFile('test.txt', 'text/plain', 'test.txt');

$ch = curl_init('http://example.com/upload.php');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, [
    'file' => $curlFile,
]);

$result = curl_exec($ch);

if ($result === false) {
    echo 'upload - FAILED' . PHP_EOL;
}

From php 8.1, the file can only reside in memory if desired using CURLStringFile:

$txt_curlfile = new \CURLStringFile('test content', 'test.txt', 'text/plain');

$ch = curl_init('http://example.com/upload.php');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, [
    'file' => $txt_curlfile
]);

$result = curl_exec($ch);

if ($result === false) {
    echo 'upload - FAILED' . PHP_EOL;
}

Reference: https://php.watch/versions/8.1/CURLStringFile

8ctopus · Accepted Answer · 2024-03-21 09:21:15Z

1

$filePath = 'your_file_full_path';
$image = fopen($filePath, "rb");
$ch = curl_init();

// If authorization is needed, then use CURLOPT_HTTPHEADER //
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Authorization: Bearer your_token'
]);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, 'upload_url');
curl_setopt($ch, CURLOPT_PUT, 1);
curl_setopt($ch, CURLOPT_INFILE, $image);
curl_setopt($ch, CURLOPT_INFILESIZE, filesize($filePath));

$result = curl_exec($ch);

if (curl_errno($ch)) {
    echo 'Error:' . curl_error($ch);
}

curl_close($ch);

edited Mar 21, 2024 at 9:21

8ctopus

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answered Feb 1, 2024 at 18:49

Asra Fud Duha

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