IMGUR file upload via PHP and cURL

Question

I'm trying to upload an image to IMGUR via PHP. This is the code:

<?
$filename = "image.jpg";
$handle = fopen($filename, "r");
$data = fread($handle, filesize($filename));

// $data is file data
$pvars   = array('image' => base64_encode($data), 'mykey' => IMGUR_API_KEY);
$timeout = 30;
$curl    = curl_init();

curl_setopt($curl, CURLOPT_URL, 'http://api.imgur.com/2/upload.xml');
curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $pvars);

$xml = curl_exec($curl);

curl_close ($curl);

?>

This is the error message I receive:

Warning: fopen(image.jpg) failed to open stream: No such file or directory

I don't understand the part: $filename = "image.jpg"; Where does the filename come from since it's a base64 generated string? Thanks, Bob

It means PHP can't find 'image.jpg' and so failed to "open" it. If the image file isn't in the same directory as this script, you'll have to specify a path pointing to the image. Either an absolute path (`/path/to/image`) or a path relative to the script (`../../elsewhere/image.jpg`). — Marc B, Apr 12 '11 at 19:38

score 2 · Answer 1 · edited May 23 '17 at 12:19

2

That warning is because fopen is trying to read in the file image.jpg from the directory from which your script is running. A good example on how to transfer a file through curl can be seen here

Send file via cURL from form POST in PHP

Where they have $localFile = $_FILES[$fileKey]['tmp_name']; you would put $localFile = '/path/to/image.jpg'; As well as change the server info and add in any other variables you may need to pass to imgur.

edited May 23 '17 at 12:19

Community

1
1

answered Apr 12 '11 at 19:20

Ryan Matthews

1,043
9
28

I don't undestand where "image.jpg" comes from. In my understanding the PHP generates it from the base64 string I send and then put it in the folder where the PHP file is in, right? – Michael Apr 12 '11 at 19:58
OK I think I found it. Just needed to delete this part: `$filename = "image.jpg"; $handle = fopen($filename, "r"); $data = fread($handle, filesize($filename));` But there is still a question open - how do I receive a callback or response from IMGUR with the path to the uploaded image? – Michael Apr 12 '11 at 22:21
You will get back an xml response. You need to pull out the URL tag from the response that is save in the variable $xml. The documentation is here: http://api.imgur.com/responses – Ryan Matthews Apr 13 '11 at 13:39
I'm using Actionscript 3 (AS3) with the PHP to upload the image. I took this from the IMGUR examples but it returns just empty: `var iresponse:XML = new XML(unescape(loader.data));` Any ideas? – Michael Apr 13 '11 at 15:42
How can I send the response from PHP to Flash? – Michael Apr 14 '11 at 15:14
all you should have to do is echo out the xml and flash should get it. I dont know too much about flash though. If everything went well you should be able to test just the php script and echo out the xml in a browser to see the source code of the return. – Ryan Matthews Apr 14 '11 at 16:53
It's working, thanks. But it's return an error that the image is corrupt. I'm passing from FLASH a base64 data string like said in the documentation. Is this PHP code right for that? http://pastebin.com/r6ZJcBn8 – Michael Apr 14 '11 at 18:50
The api says you can upload a binary file as well, you may want to try that solution. This is the url I am getting my info from http://dtbaker.com.au/random-bits/uploading-a-file-using-curl-in-php.html your $post_array var though would include image=> and key=> – Ryan Matthews Apr 14 '11 at 19:15
Doesn't help. I send a base64 encoded data to the PHP - so do I need to remove the "base64_encode" part from inside the PHP cause it's already encoded? here is the code: + http://pastebin.com/r6ZJcBn8 – Michael Apr 14 '11 at 22:45
If you are sending it the image data already base64_encoded you would have to remove that part because it is already encoded. – Ryan Matthews Apr 15 '11 at 12:36

score 0 · Answer 2 · answered Jan 30 '13 at 04:11

Change line 1 from:

$filename = "image.jpg";

To:

$filename = $_FILES['uploaded_file']['tmp_name'];

Then, to post... I recommend a form similar to this:

    <form enctype="multipart/form-data" method="post" action="upload.php" target="my_iframe">
    Choose your file here:
    <input name="uploaded_file" type="file"/>
    <input type="submit" value="Upload It"/>
    </form>
<!-- when the form is submitted, the server response will appear in this iframe -->
<script language="JavaScript">
<!--
function autoResize(id){
    var newheight;
    var newwidth;

    if(document.getElementById){
        newheight=document.getElementById(id).contentWindow.document .body.scrollHeight;
        newwidth=document.getElementById(id).contentWindow.document .body.scrollWidth;
    }

    document.getElementById(id).height= (newheight) + "px";
    document.getElementById(id).width= (newwidth) + "px";
}
//-->
</script>

<IFRAME name="my_iframe" width="100%" height="200px" id="iframe1" marginheight="0" frameborder="0" onLoad="autoResize('iframe1');"></iframe>

If you put all your php into upload.php and then have that form on a page in the same directory, it's pretty close to being functional... Except you don't yet have an API_KEY in your source. You can get an API KEY here: https://imgur.com/register/api_anon

In the end your php should look like this:

    <?
    if( isset($_FILES['uploaded_file']) )
{
    $IMGUR_API_KEY = 'u432ewriuq3oirefuie'; //put your api key here
    $filename = $_FILES['uploaded_file']['tmp_name'];
    $handle = fopen($filename, "r");
    $data = fread($handle, filesize($filename));

    //$data is file data
    $pvars   = array('image' => base64_encode($data), 'key' => $IMGUR_API_KEY);
    #$pvars   = array('key' => $IMGUR_API_KEY);
    $timeout = 30;
    $curl    = curl_init();

    curl_setopt($curl, CURLOPT_URL, 'http://api.imgur.com/2/upload.xml');
    #curl_setopt($curl, CURLOPT_URL, 'http://api.imgur.com/2/gallery.xml');
    curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);
    curl_setopt($curl, CURLOPT_POST, 1);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl, CURLOPT_POSTFIELDS, $pvars);
    $xml = curl_exec($curl);
    $xmlsimple = new SimpleXMLElement($xml);
    echo '<img height="180" src="';
    echo $xmlsimple->links->original;
    echo '">';

    curl_close ($curl);
    }
?>

IMGUR file upload via PHP and cURL

2 Answers2