Test, validate and match regular expressions
Validates Egyptian mobile phone numbers in international format, requiring the +20 country code followed by a two-digit operator prefix (10 for Vodafone, 11 for Etisalat, 12 for Orange, or 15 for WE) and exactly 8 subscriber digits. The multiline flag enables matching numbers across multiple lines, making it ideal for validating bulk contact lists or extracting numbers from multi-line text data.