Get all the contributors from the repos of an organization

composer.json

{
    "require": {
        "guzzlehttp/guzzle": "4.*"
    }
}

fetch-contributors.php

<?php
$username = 'username';
$password = 'api-key';
$organization = 'auraphp';
$file = __DIR__ . '/contributors.json';

require __DIR__ . '/vendor/autoload.php';

if (file_exists($file)) {
    $json_string = file_get_contents($file);
    $contributors = json_decode($json_string, true);
} else {
    $contributors = [];
}

$client = new GuzzleHttp\Client();

$last_page = $page = 1;

do {
    $org_url = "https://api.github.com/orgs/{$organization}/repos?per_page=30&page={$page}";
    $request = $client->get($org_url, ['auth' =>  [$username, $password]]);
    $repos = $request->json();
    if ($page == 1 && $request->getHeader('link')) {
        preg_match('/page=(\d+)>; rel="last"$/', $request->getHeader('link'), $matches);
        $last_page = $matches[1];
    }

    foreach ($repos as $repo) {
        $contrib_last_page = $contrib_page = 1;
        do {
            $repo_url = "https://api.github.com/repos/{$organization}/{$repo['name']}/contributors?per_page=30&page={$contrib_page}";
            try {
                $request_repo = $client->get($repo_url, ['auth' =>  [$username, $password]]);
                $repo_contributors = $request_repo->json();
                if ($contrib_page == 1 && $request_repo->getHeader('link')) {
                    preg_match('/page=(\d+)>; rel="last"$/', $request_repo->getHeader('link'), $matches);
                    $contrib_last_page = $matches[1];
                }
                foreach ($repo_contributors as $contributor) {
                    if (! isset($contributors[$contributor['login']])) {
                        $login = $contributor['login'];
                        try {
                            $request = $client->get("https://api.github.com/users/$login", ['auth' =>  [$username, $password]]);
                            $result = $request->json();
                        } catch (Exception $e) {
                        }
                        $name = !empty($result['name']) ? $result['name'] : $contributor['login'];
                        $contributors[$contributor['login']] = array(
                            'html_url' => $contributor['html_url'],
                            'avatar_url' => $contributor['avatar_url'],
                            'name' => $name
                        );
                    }
                }
                $contrib_page++;
            } catch (Exception $e) {
                echo $e->getMessage();
            }
        } while($contrib_page <= $contrib_last_page);
    }
    $page++;
} while($page <= $last_page);

file_put_contents($file, json_encode($contributors, JSON_PRETTY_PRINT));

echo "Total contributors : " . count($contributors) . PHP_EOL;