About The PHP Experts

Developer guides: check domain availability via API, query RDAP and whois in PHP, read DNS records, validate domains, IDN and punycode.

Who is behind it

The PHP Experts is published by OnlineBuilders LLC. The same company runs the domain registrar betadomain.de. When articles link to domain registration, those links go to betadomain. We say so openly because it matters for how you weigh our recommendations.

About OnlineBuilders

OnlineBuilders LLC is a U.S. technology studio founded in Delaware in 2020. It builds and runs its own SaaS and AI platforms and delivers projects for companies, including software development. Contact: onlinebuilders.biz/contact.

How we work

• Prices come from betadomain's public price feed and are re-read on every publish. Last update: 18 October 2026.
• Technical guides are checked against current tools; commands and code samples are printed as they run.
• Registry rules (DENIC, EURid, Verisign etc.) are quoted from their own policies, with the source linked.
• Spotted a mistake? Write to [email protected].