How to implement imgur api (image host) on a website? - php

Question

I came across http://api.imgur.com and thought that would be a usefull tool to use on my website. I then noticed that StackOwerflow uses it too, so it must be good )))
Although I'm struggling when I try to implement it. I took a look at
http://api.imgur.com/examples the PHP section, but it didn't help me much.
What I'm interested in is includin imgur api on my website so users can upload their images. I would than need to store img url/path so I can display it on a website.
e.g. have a form that will allow users to upload photo, then store url/path of the uploaded image in a database (VARCHAR).
Has anyone had a success with this system and could help me understand how to implement it like StackOwerflow uses it (only store image url in database not post).
Code I tried:
<form enctype="multipart/form-data" method="post" action="upload_img.php">
Choose your file here:
<input name="uploaded_file" type="file"/>
<input type="submit" value="Upload It"/>
</form>
upload_img.php
<?
$filename = "image.jpg";
$handle = fopen($filename, "r");
$data = fread($handle, filesize($filename));
// $data is file data
$pvars = array('image' => base64_encode($data), '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_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);
?>

Answer 1

I see that you have copy and pasted the example from the imgur API site, which gives the example of a filename which is contained within $filename. You need to point this variable at the file that PHP has uploaded.
Modify the $filename part of your script:
$filename = $_FILES['uploaded_file']['tmp_name'];
Source: POST method file uploading