from PHP, how I can detect visitior using IPv6 ?

000

• October 29, 2020 22:19

Hi, I read: Then . . . using PHP, how we can detect if visitor is using IPv6 ?
how is the REGEX ?

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  cPanelChris

  • October 30, 2020 06:51

  Hello @000 , Something like the following should work to check what protocol an IP is. [CODE=php]
  

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  000

  • October 30, 2020 16:41

  Many thanks Chrish :) Then if we have RECORD in data base as[PHP]column_ip_client = varchar 15[/PHP]that is WRONG ? Any day, any hour our web can go visited by FILTER_FLAG_IPV6
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  cPanelChris

  • October 31, 2020 06:03

  Hello @000 , An IPv6 IP address can contain up to 39 characters including the semicolons. As such, a varchar of length 15 would not be guaranteed to be able to hold the IP. If the IP exceeds 15 characters, only the first 15 characters would be stored. This is documented at the link below.

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  000

  • November 01, 2020 04:40

  An IPv6 IP address can contain up to 39 characters...

  
  Oh, thanks again.Then many code around Internet is broken! ... Oh god ...

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