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How to login and signup with Instagram using php


Now implement In PHP: config.php

/* Instagram App Client Id */
define('INSTAGRAM_CLIENT_ID', 'INSTAGRAM_CLIENT_ID-XXXXXXX');

/* Instagram App Client Secret */
define('INSTAGRAM_CLIENT_SECRET', 'INSTAGRAM_CLIENT_SECRET-XXXXXXXXX');

/* Instagram App Redirect Url */
define('INSTAGRAM_REDIRECT_URI', 'INSTAGRAM_REDIRECT_URI-XXXXXXXX');

Create login with Instagram button: index.php

First Include here config.php

// include here config.php
require_once('config.php');

// Create login URl
$instURL = "https://api.instagram.com/oauth/authorize/?client_id=" . INSTAGRAM_CLIENT_ID . "&redirect_uri=" . urlencode(INSTAGRAM_REDIRECT_URI) . "&response_type=code&scope=basic";

Instagram button code

<html>
<head>
  <title>Login with Instagram</title>
</head>

<body>
	<a href="<?php echo $instURL; ?>">Login with Instagram</a>
</body>

</html>      

function.php

Redirection page after login authentication success Instagram API Class will send the user details object in a array data format.

// Create API class for Instagram API
class InstagramAuth 
{
	public function GetToken($client_id, $redirect_uri, $client_secret, $code) {		
		$url = 'https://api.instagram.com/oauth/access_token';
		
		$urlPost = 'client_id='. $client_id . '&redirect_uri=' . $redirect_uri . '&client_secret=' . $client_secret . '&code='. $code . '&grant_type=authorization_code';
		$ch = curl_init();		
		curl_setopt($ch, CURLOPT_URL, $url);		
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($ch, CURLOPT_POST, 1);		
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
		curl_setopt($ch, CURLOPT_POSTFIELDS, $urlPost);			
		$data = json_decode(curl_exec($ch), true);	
		$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);	
		curl_close($ch); 		
		if($http_code != '200')			
			throw new Exception('Error : Failed to receive access token');
		
		return $data['access_token'];	
	}

	public function GetUserProfileInformation($access_token) { 
		$url = 'https://api.instagram.com/v1/users/self/?access_token=' . $access_token;	

		$ch = curl_init();		
		curl_setopt($ch, CURLOPT_URL, $url);		
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);	
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
		$data = json_decode(curl_exec($ch), true);
		$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);	
		curl_close($ch); 
		if($data['meta']['code'] != 200 || $http_code != 200)
			throw new Exception('Error : Failed to get user information');

		return $data['data'];
	}
}

success.php

Redirection page after login authentication success Instagram API will send the user details object in a array data format.

session_start();
// include here config.php
require_once('config.php');

// include here function.php
require_once('function.php');

// Instagram passes a parameter 'code' in the Redirect Url
if (isset($_GET['code'])) {
    try {
        $instagram_C = new InstagramAuth();

        // Get the access token 
        $access_token = $instagram_C->GetToken(INSTAGRAM_CLIENT_ID, INSTAGRAM_REDIRECT_URI, INSTAGRAM_CLIENT_SECRET, $_GET['code']);

        // Get user information
        $user_info = $instagram_C->GetUserProfileInformation($access_token);
        echo json_encode($user_info);
    } catch (Exception $e) {
        echo $e->getMessage();
        exit;
    }
}