Build, test, and debug regular expressions
Matches phone numbers in a wide variety of international formats. Supports an optional country code with a leading plus sign (e.g., +1, +44), an optional area code in parentheses, and number segments of varying lengths separated by dashes, dots, or whitespace. Handles formats like +1-555-123-4567, (555) 123-4567, and 555.123.4567. Useful for loosely extracting or validating phone numbers from text worldwide.