I am using the following regex for validating Group Links For WhatsApp url’s.
$regex = '/^(https?://)?chat(?:.whatsapp.com/)([a-zA-Z0-9_-]{22})$/';//its working for without 'invite'
I want the regex to support the following URL formats:
https://chat.whatsapp.com/FrTz7HJfmKjAROYZsfDrKQ https://chat.whatsapp.com/invite/FrTz7HJfmKjAROYZsfDrKQ
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Answer
You can try this:
^(https?://)?chat.whatsapp.com/(?:invite/)?([a-zA-Z0-9_-]{22})$
(?:invite/)? makes the invite/ block optional.