instagram-get-user-media.php

<?php
session_start(); 
require_once __DIR__ . "/vendor/autoload.php";
require_once __DIR__ . "/config.php";

//retrieve images
if (!empty($_SESSION['data'])){
    $token = $_SESSION['data']['access_token'];
    $client = new GuzzleHttp\Client();
    $response = $client->request('GET', 'https://api.instagram.com/v1/users/self/media/recent/', array(
                        'query' => array(
                            'access_token'   => $token,
                            'COUNT'          => 99999999999,
                            'client_id'      => CLIENT_ID,
                    )));
    $body = (string) $response->getBody();
    echo $body;
    die;
}

//check Oauth flow
if (empty($_REQUEST['code']) ) {
    $oauth_url = "https://api.instagram.com/oauth/authorize/?client_id=" . CLIENT_ID . "&redirect_uri=" . APPROOT . "/oauth.php&response_type=code";
    header('Location: ' . $oauth_url);
    //&scope=likes+comments+public_content+follower_list+relationships
    die;
} else {
    //request access token
    $client = new GuzzleHttp\Client();
    $response = $client->request('POST', 'https://api.instagram.com/oauth/access_token', array(
                        'form_params' => array(
                            'code'               => $_REQUEST['code'],
                            'client_secret'      => CLIENT_SECRET,
                            'client_id'          => CLIENT_ID,
                            'grant_type'         => 'authorization_code',
                            'redirect_uri'       => APPROOT . "/oauth.php",
                        )));
    if ($response->getStatusCode() == 200){
        $body = $response->getBody();
        $data = json_decode($body->getContents(), true);
        //save access token
        $_SESSION['data'] = $data;
        echo $data['access_token'];
    } else {
        echo $response->getReasonPhrase(); 
        echo  (string) $response->getBody();
    }
}