re = /^(?:(\+[0-9]{1,3})[ -])?\(?\d{3}\)?[- ]?\d{3}[- ]?\d{4}/im
str = '1234567890
123-456-7890
(123)456-7890
123 456 7890
+1 123 456 7890
+123 123 456 7890
+1234 123 456 7890
+23 (123) 456-7890
+23 (123) 123-456-7890'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html