I’m adding social connectivity to my existing PHP-based dashboard and need an expert who can wire up full OAuth flows for Facebook, Instagram, X/Twitter, and LinkedIn. The job is limited to user authentication and transparent token refresh; once the tokens are in place I also want clean helper methods that can publish text updates, single-image posts, and simple video clips to the same accounts. The work happens in PHP 8 on a plain stack—no heavy frameworks—so Guzzle, cURL or the official vendor SDKs are all fine as long as they stay composer-friendly. Please keep secrets in .env, handle callback URLs gracefully, and store long-lived tokens in MySQL using prepared statements. Deliverables • Well-documented PHP classes (one per platform or a unified service) that: – complete OAuth login and return user tokens – refresh tokens automatically before expiry – expose sendText(), sendImage(), sendVideo() methods • A lightweight demo script showing each flow end-to-end • README with setup notes, required app permissions, and any rate-limit caveats Acceptance will be based on running the demo locally, authenticating with my own test accounts, and seeing posts land successfully across all four networks without manual token intervention. Already fb app we have approved one