why results for php curl file upload method differs from html form file upload?

Question

I was working on some projects and suddenly I came up with this issue.
Consider having a file named requestWithFile.htm with the contents like this:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
</head>
<body>
  <form method="POST" action='http://127.0.0.1/pv.php' enctype="multipart/form-data">
    <input type="text" name="url" value="https://example.com/" /><br>
    <input type="file" name="myfile" /><br>
    <input type="submit">
  </form>
</body>
</html>

and another file which in php named requestWithFile.php which does the same job:

<?php
    $requesturl = "http://127.0.0.1/pv.php";
    $file = realpath('touploadfile.jpg');

    $ch = curl_init($requesturl);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, array(
    "url" => "https://example.com/",
    "myfile" => "@".$file
    ));
    echo curl_exec($ch);
    curl_close($ch);
?>

My post parameters in both situations are:
url => https://example.com/
myfile => a file named touploadfile.jpg
which touploadfile.jpg file is in the same directory with both the html and the php files.

The pv.php file contains codes to display the requests that we have made. Those codes are:

<?php
    echo "The \$_POST :<br>\n\n";
    print_r($_POST); print "\n\n<br><br>";
    echo "The \$_GET :<br>\n\n";
    print_r($_GET); print "\n\n<br><br>";
    echo "The \$_REQUEST :<br>\n\n";
    print_r($_REQUEST); print "\n\n<br><br>";
    echo "The \$_FILES :<br>\n\n";
    print_r($_FILES); print "\n\n<br><br>";
    echo "The apache_request_headers: :<br>\n\n";
    print_r(apache_request_headers()); print "\n\n<br><br>";
?>

NOW

If we make requests with the first file requestWithFile.htm, the browser echoes out:

The $_POST :
Array ( [url] => https://example.com/ )

The $_GET :
Array ( )

The $_REQUEST :
Array ( [url] => https://example.com/ )

The $_FILES :
Array ( [myfile] => Array ( [name] => touploadfile.jpg [type] => image/jpeg [tmp_name] => C:\xampp\tmp\phpB1B1.tmp [error] => 0 [size] => 69 ) )

The apache_request_headers: :
Array ( [Host] => 127.0.0.1 [User-Agent] => Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0 [Accept] => text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 [Accept-Language] => en-US,en;q=0.5 [Accept-Encoding] => gzip, deflate [Referer] => http://127.0.0.1/requestWithFile.htm [Connection] => keep-alive [Content-Type] => multipart/form-data; boundary=---------------------------1848618309200 [Content-Length] => 377 )

but If we make the same request with requestWithFile.php file the result differs:

The $_POST :
Array ( [url] => https://example.com/ [myfile] => @C:\xampp\htdocs\touploadfile.jpg )

The $_GET :
Array ( )

The $_REQUEST :
Array ( [url] => https://example.com/ [myfile] => @C:\xampp\htdocs\touploadfile.jpg )

The $_FILES :
Array ( )

The apache_request_headers: :
Array ( [Host] => 127.0.0.1 [Accept] => */* [Content-Length] => 304 [Expect] => 100-continue [Content-Type] => multipart/form-data; boundary=------------------------122eddaaad7fe29d )

Except the difference between headers (which is because of sending from a web browser in the html file) the question that comes to mind is:
Why the value for $_FILES is empty for the php file?
Why the results for two identical requests differs ?
I myself cant figure it out.

toster-cx · Accepted Answer · 2016-03-18 10:35:19Z

2

Which version of PHP are you on? The @ syntax for file uploads is being dropped since 5.6. See the new one:

https://wiki.php.net/rfc/curl-file-upload

So basically it should look something like:

curl_setopt($ch, CURLOPT_POSTFIELDS, array(
  "url" => "https://example.com/",
  "myfile" => curl_file_create($file) // alias of new CURLFile($path)
));

edited Mar 18, 2016 at 10:35

answered Mar 18, 2016 at 10:29

toster-cx

2,3971 gold badge27 silver badges32 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Amir Hossein Baghernezad Over a year ago

its 7.0.3 ... but when I use your code another problem occurs. My code echoes no result on the page! It is empty now!

Amir Hossein Baghernezad Over a year ago

I changed the request url to somewhere and then back to 127.0.0.1 . for unknown reason Its OK now .

Collectives™ on Stack Overflow

why results for php curl file upload method differs from html form file upload?

NOW

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

NOW

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related