using imgur api v3 to upload images anonymously using php

Question

I am planning to upload images to imgur anonymously using its api, i registered my application in the anonymous upload category and got client id and client secret, How to use php to upload image to imgur and retrieve direct url to the image? can anyone suggest links to any example? this is what I have tried to do but i get the error "Fatal error: Maximum execution time of 30 seconds exceeded"

<?php

$client_id = :client_id; //put your api key here
$filename = "images/q401x74ua3402.jpg";
$handle = fopen($filename, "r");
$data = fread($handle, filesize($filename));

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

curl_setopt($curl, CURLOPT_URL, 'https://api.imgur.com/3/upload.json');
curl_setopt($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);

?>

Answer 1

Sending the client_id in a post variable is the problem. It needs to be sent in the request header. Also, you're requesting a JSON response, but trying to parse it as XML.

<?php

$client_id = "FILLMEIN";
$image = file_get_contents("img/cool.jpg");

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://api.imgur.com/3/image.json');
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Authorization: Client-ID ' . $client_id));
curl_setopt($ch, CURLOPT_POSTFIELDS, array('image' => base64_encode($image)));

$reply = curl_exec($ch);
curl_close($ch);

$reply = json_decode($reply);
printf('<img height="180" src="%s" >', $reply->data->link);

update 1

Live functional example with and source based on this code with debug output.

Answer 2

found the error, I need to send authorization details as header, eg code

<?php
$client_id = 'xxxxxxxx';

$file = file_get_contents("test-image.png");

$url = 'https://api.imgur.com/3/image.json';
$headers = array("Authorization: Client-ID $client_id");
$pvars  = array('image' => base64_encode($file));

$curl = curl_init();

curl_setopt_array($curl, array(
   CURLOPT_URL=> $url,
   CURLOPT_TIMEOUT => 30,
   CURLOPT_POST => 1,
   CURLOPT_RETURNTRANSFER => 1,
   CURLOPT_HTTPHEADER => $headers,
   CURLOPT_POSTFIELDS => $pvars
));

$json_returned = curl_exec($curl); // blank response
echo "Result: " . $json_returned ;

curl_close ($curl); 

?>