Picture upload to Cloudinary without bloated Cloudinary PHP-SDK.

Cloudinary.php

<?php

// Cloudinary API
define('CLOUDINARY_API_KEY', 'XXXXXXXX');
define('CLOUDINARY_SECRET_KEY', 'XXXXXXXX');
define('CLOUDINARY_API_URL', 'https://api.cloudinary.com/v1_1/XXXXXXXX/image/upload');

// Image handling
$path = 'picture.png';
$type = pathinfo($path, PATHINFO_EXTENSION);
$data = file_get_contents($path);
$base64 = 'data:image/' . $type . ';base64,' . base64_encode($data);

// Cloudinary options
$args = array(
    'invalidate' => true,
    'public_id' => 'picture',
    'timestamp' => time()
);

// Request signature
$signature = sha1(http_build_query($args) . CLOUDINARY_SECRET_KEY);

// Request attributes
$args = array_merge(
    $args,
    array(
        'file' => $base64,
        'api_key' => CLOUDINARY_API_KEY,
        'signature' => $signature
    )
);

$ch = curl_init(CLOUDINARY_API_URL);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $args);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($ch);
curl_close($ch);

die($result);