re = /facebook\.com\/(?:photo.php\?v=|video\/embed\?video_id=|v\/?)(\d+)/i
str = 'https://www.facebook.com/photo.php?v=0123456789&set=t.674367&type=3&theater
http://www.facebook.com/video/embed?video_id=0123456789
http://www.facebook.com/v/0123456789'
# 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