#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "(?x)(?:\s|^) # Start of string or word boundary" & @CRLF & _
"( # Capture Group" & @CRLF & _
"(?: # Non-Capture Group for X." & @CRLF & _
"(?: # Nested NCG for 0..255" & @CRLF & _
"(?:\d){1,2}| # Allow any single digit or any pair of digits or" & @CRLF & _
"(?:1\d{2})| # 3 Digits starting with 1 or" & @CRLF & _
"(?:2[0-4]\d)| # 3 Digists starting with 20..24 or" & @CRLF & _
"(?:25[0-5]) # 250..255" & @CRLF & _
") # this should allow X=0..255 in the NCG" & @CRLF & _
"\. # Must be followed by a literal ." & @CRLF & _
"){3} # X. Must repeat exactly 3 times" & @CRLF & _
"(?: # NCG for final 0..255" & @CRLF & _
"(?:\d{1,2})| # Allow any single digit or any pair of digits or" & @CRLF & _
"(?:1\d{2})| # 3 Digits starting with 1 or" & @CRLF & _
"(?:2[0-4]\d)| # 3 digits starting 20..24 or" & @CRLF & _
"(?:25[0-5]) # 250.255" & @CRLF & _
") # End of final 0.255" & @CRLF & _
") # End of capture group" & @CRLF & _
"(?:\s|$) # Must be followed by EOS or wspace"
Local $sString = "123.123.123.145 is an IP4 so is 1.2.3.4 and 1.22.33.44 but 256.1.2.3 isn't 254.1.2.3 is but 260.1.1.1 isn't nor 2.5.256.1 and 1.2.3.4:222 IP6 1.2.3.4.5.6"
Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH)
Local $aFullArray[0]
For $i = 0 To UBound($aArray) -1
_ArrayConcatenate($aFullArray, $aArray[$i])
Next
$aArray = $aFullArray
; Present the entire match result
_ArrayDisplay($aArray, "Result")
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 AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm