Module talk:IPAddress

isIp

Takes a single argument, a string, and returns:

• "6" if it is a valid IPV6 address
• "4" if it is a valid IPV6 address
• empty string if it is neither.

When applied to {{PAGENAME}}, this helps determine whether a template is being placed on an anonymous user page/user talk page or not, as used in Template:AfC talk:

{{#if:{{IsIPAddress|{{PAGENAME}}}}|I'm on an anonymous IP user or user talk page|I'm on some other page}}

Note that extra whitespace is not permitted (e.g. "127.0.0.1 " with an extra space at the end is not a valid IP address).

isIpV6

Returns 1 if the given argument is a valid IPv6 address, else 0.

isIpV4

Returns 1 if the given argument is a valid IPv4 address, else 0.