re = /^(\+)(?(1))\d{1,3}?[- ]?\d{10}$|^([^0])(?(1))\d{9}?$|^([0])(?(1))\d{10}?$/
str = '+91-4040404040'
# Print the match result
str.match(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