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Add Flickr upload photo example
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‎examples/Flickr.class.php

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<?php
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define('FLICKR_API_KEY', 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX');
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define('FLICKR_API_SECRET', 'XXXXXXXXXXXXXXXX');
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class Flickr
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{
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public function __construct()
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{
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if (session_status() === PHP_SESSION_NONE) {
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session_start();
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}
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}
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public function authenticate()
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{
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if (isset($_SESSION['authenticated']) && $_SESSION['authenticated']) {
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return;
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}
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if (isset($_GET['oauth_token']) && isset($_GET['oauth_verifier'])) {
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$this->getAccessToken();
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} else {
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$this->getRequestToken();
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}
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}
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public function uploadPhoto()
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{
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$oauth_data = $this->getOAuthParameters();
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$oauth_data['oauth_token'] = $_SESSION['oauth_access_token'];
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$oauth_data['title'] = $_POST['title'];
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$oauth_data['tags'] = $_POST['tags'];
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$upload_url = 'https://up.flickr.com/services/upload/';
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$oauth_data['oauth_signature'] = $this->getSignature('POST', $upload_url, $oauth_data);
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$oauth_data['photo'] = '@' . $_FILES['photo']['tmp_name'];
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$curl = new Curl();
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$curl->post($upload_url, $oauth_data);
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return $curl;
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}
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private function getOAuthParameters()
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{
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return array(
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'oauth_nonce' => md5(microtime() . mt_rand()),
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'oauth_timestamp' => time(),
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'oauth_consumer_key' => FLICKR_API_KEY,
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'oauth_signature_method' => 'HMAC-SHA1',
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'oauth_version' => '1.0',
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);
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}
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private function getSignature($request_method, $url, $parameters)
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{
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ksort($parameters, SORT_STRING);
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$request = implode('&', array(
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rawurlencode($request_method),
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rawurlencode($url),
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rawurlencode(http_build_query($parameters, '', '&', PHP_QUERY_RFC3986)),
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));
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$key = FLICKR_API_SECRET . '&';
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if (!empty($_SESSION['oauth_access_token_secret'])) {
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$key .= $_SESSION['oauth_access_token_secret'];
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} elseif (!empty($_SESSION['oauth_token_secret'])) {
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$key .= $_SESSION['oauth_token_secret'];
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}
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$signature = base64_encode(hash_hmac('sha1', $request, $key, true));
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return $signature;
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}
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private function getRequestToken()
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{
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$oauth_data = $this->getOAuthParameters();
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$oauth_data['oauth_callback'] = implode('', array(
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isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on' ? 'https' : 'http',
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'://',
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$_SERVER['SERVER_NAME'],
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$_SERVER['SCRIPT_NAME'],
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));
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$request_token_url = 'https://www.flickr.com/services/oauth/request_token';
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$oauth_data['oauth_signature'] = $this->getSignature('POST', $request_token_url, $oauth_data);
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$curl = new Curl();
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$curl->post($request_token_url, $oauth_data);
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parse_str($curl->response, $parts);
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$_SESSION['oauth_token_secret'] = $parts['oauth_token_secret'];
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// Continue to Flickr for user's authorization.
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header('Location: https://secure.flickr.com/services/oauth/authorize?' . http_build_query(array(
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'oauth_token' => $parts['oauth_token'],
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'perms' => 'write',
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)));
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exit;
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}
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private function getAccessToken()
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{
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$oauth_data = $this->getOAuthParameters();
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$oauth_data['oauth_token'] = $_GET['oauth_token'];
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$oauth_data['oauth_verifier'] = $_GET['oauth_verifier'];
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$access_token_url = 'https://www.flickr.com/services/oauth/access_token';
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$oauth_data['oauth_signature'] = $this->getSignature('POST', $access_token_url, $oauth_data);
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$curl = new Curl();
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$curl->post($access_token_url, $oauth_data);
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parse_str($curl->response, $parts);
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$_SESSION['oauth_access_token'] = $parts['oauth_token'];
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$_SESSION['oauth_access_token_secret'] = $parts['oauth_token_secret'];
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$_SESSION['user_id'] = $parts['user_nsid'];
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$_SESSION['authenticated'] = true;
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}
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}

‎examples/flickr_upload_photo.php

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<?php
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require '../src/Curl.class.php';
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require 'Flickr.class.php';
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$flickr = new Flickr();
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$flickr->authenticate();
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?>
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<!doctype html>
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<title>Flickr Photo Upload</title>
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</head>
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<body>
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<?php
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if ($_SERVER['REQUEST_METHOD'] === 'POST') {
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$result = $flickr->uploadPhoto();
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if ($result->error) {
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echo '<p>Photo upload failed.</p>';
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} else {
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$user_id = $_SESSION['user_id'];
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$photo_id = $result->response->photoid;
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$photo_url = 'http://www.flickr.com/photos/' . $user_id . '/' . $photo_id;
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echo '<p>Photo uploaded successfully. <a href="' . $photo_url . '">View photo</a>.</p>';
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}
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}
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?>
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<form enctype="multipart/form-data" method="post">
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<fieldset>
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<legend>Flickr Photo Upload</legend>
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<label>Photo <input name="photo" type="file" /></label><br />
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<label>Title <input name="title" placeholder="Vacation (optional)" type="text" /></label><br />
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<label>Tags <input name="tags" placeholder="tropical,beach,vacation (optional)" type="text" /></label><br />
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<input type="submit" />
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</fieldset>
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</form>
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</body>
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</html>

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