IMGUR file upload via PHP and cURL - php

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

Answer 1

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.

Answer 2

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);
}
?>