regex101: Parsing browser User Agents

Regular Expression

(?(DEFINE)
  (?P<ver>\d+(?:\.\d+)*(?![.\d]))
  (?P<agent>Mozilla/(?&ver))

  (?P<os>(?&os_windows)|(?&os_linux)|(?&os_macintosh)|(?&os_ios))
    (?P<os_windows>Windows[ ]\w+[ ](?&ver))
    (?P<os_linux>Linux(?:[ ](?:i686|x86_64))?)
    (?P<os_macintosh>Macintosh)
    (?P<os_ios>(?:CPU[ ])?iPhone[ ]OS|CPU[ ]OS.*?like[ ]Mac[ ]OS[ ]X)

  (?P<device>(?&device_ios)|(?&device_firefox)|(?&device_android))
    (?P<device_ios>iPhone|iPad)
    (?P<device_firefox>Mobile)
    (?P<device_android>Android(?:[ ](?&ver))?)

  (?P<browser>
    (?:
      (?&browser_ie)
    | (?&browser_safari)
    | (?&browser_chrome)
    | (?&browser_chromium)
    | (?&browser_firefox)
    | (?&browser_version)
#    | (?&browser_nexus)
    | (?&browser_mobile)
    | (?&browser_gsa)
    | (?&browser_quicklook)
    | (?&browser_opera)
    )

    [ /]

    (?: [A-Z\d]+\b(?!\.) | (?&ver) )
  )
    (?P<browser_safari>(?:Mobile[ ])?Safari)
    (?P<browser_chrome>Chrome)
    (?P<browser_chromium>\b\w+\b[ ]Chromium)
    (?P<bro

Unit Tests

There are no unit tests.