Add Instagram example

Author: zachborboa

examples/instagram_popular_media.php

@@ -0,0 +1,57 @@
+<?php
+require '../src/Curl.class.php';
+
+
+define('INSTAGRAM_CLIENT_ID', 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX');
+define('INSTAGRAM_CLIENT_SECRET', 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX');
+
+session_start();
+
+$redirect_uri = implode('', array(
+    isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on' ? 'https' : 'http',
+    '://',
+    $_SERVER['SERVER_NAME'],
+    $_SERVER['SCRIPT_NAME'],
+));
+
+if (isset($_GET['code'])) {
+    $code = $_GET['code'];
+
+    $curl = new Curl();
+    $curl->post('https://api.instagram.com/oauth/access_token', array(
+        'client_id' => INSTAGRAM_CLIENT_ID,
+        'client_secret' => INSTAGRAM_CLIENT_SECRET,
+        'grant_type' => 'authorization_code',
+        'redirect_uri' => $redirect_uri,
+        'code' => $code,
+    ));
+
+    if ($curl->error) {
+        echo $curl->response->error_type . ': ' . $curl->response->error_message . '<br />';
+        echo '<a href="?">Try again?</a>';
+        exit;
+    }
+
+    $_SESSION['access_token'] = $curl->response->access_token;
+}
+
+if (isset($_SESSION['access_token'])) {
+    $curl = new Curl();
+    $curl->get('https://api.instagram.com/v1/media/popular', array(
+        'access_token' => $_SESSION['access_token'],
+    ));
+    foreach ($curl->response->data as $media) {
+        echo
+            '<a href="' . $media->link . '" target="blank">' .
+                '<img alt="" src="' . $media->images->thumbnail->url . '" />' .
+            '</a>';
+    }
+}
+else {
+    header('Location: https://api.instagram.com/oauth/authorize/?' . http_build_query(array(
+        'client_id' => INSTAGRAM_CLIENT_ID,
+        'redirect_uri' => $redirect_uri,
+        'response_type' => 'code',
+    )));
+    exit;
+}