Regex Tester & Validator

Matches South African cell/mobile numbers with an optional '+' prefix, followed by either the national trunk prefix '0' or the international country code '27'. It then expects a mobile prefix digit (5-9) plus one more digit, and groups of 3 and 4 digits, with optional single spaces as separators (e.g., 0821234567, +27821234567, 082 123 4567). With global/multiline flags, it's useful for validating SA cell numbers in forms or extracting multiple numbers from multiline text.