RFC3261 Uri Regex

gistfile1.php

<?php
const SIP_PATTERN = '~^
    (?:(?<schema>sip(s)?):)?
    (?:
        (?<user>(?:[a-z0-9\-_\.!\~*\'\(\)]|%[0-9a-f]{2}|[&=\+$,;?\/])+) # user ( unreserved / escaped / user-unreserved )
        (?::(?<password>(?:[a-z0-9\-_\.!\~*\'\(\)]|%[0-9a-f]{2}|[&=\+$,])+))? # password ( unreserved / escaped / "&" / "=" / "+" / "$" / "," )
    @)? # userinfo
    (?<host>
        (?:[\pL\pN\pS-\.])+(?:\.?(?:[\pL]|xn\-\-[\pL\pN-]+)+\.?) # a domain name
            |                                              # or
        \d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}                 # a IP address
            |                                              # or
        \[
            (?:(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){6})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:::(?:(?:(?:[0-9a-f]{1,4})):){5})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){4})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,1}(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){3})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,2}(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){2})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,3}(?:(?:[0-9a-f]{1,4})))?::(?:(?:[0-9a-f]{1,4})):)(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,4}(?:(?:[0-9a-f]{1,4})))?::)(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,5}(?:(?:[0-9a-f]{1,4})))?::)(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,6}(?:(?:[0-9a-f]{1,4})))?::))))
        \]  # a IPv6 address
    )
    (?:\:(?<port>[0-9]+))? # a port (optional)

    (?<parameters>(?:;
        (?<pname>(?:[a-z0-9\-_\.!\~*\'\(\)]|%[0-9a-f]{2}|[\[\]\/:&+$])+)  # pname
        (?:
            =
            (?<pvalue>(?:[a-z0-9\-_\.!\~*\'\(\)]|%[0-9a-f]{2}|[\[\]\/:&+$])+) # pvalue
        )?
    )*) #uri-parameters (optional)

    (?<headers>\?
        (?<header>
            (?<hname>(?:[a-z0-9\-_\.!\~*\'\(\)]|%[0-9a-f]{2}|[\[\]\/?:\+$])+) # hname
            =
            (?<hvalue>(?:[a-z0-9\-_\.!\~*\'\(\)]|%[0-9a-f]{2}|[\[\]\/?:\+$])*) # hvalue
        )(?:&(?P>header))*
    )? #uri-headers (optional)
$~ixu';