#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "(?m)(.*)(?:\bm\.)(.*)|(.*)"
Local $sString = "https://m.gsmarena.com/sony_xperia_5_iv-price-11838.php" & @CRLF & _
"https://redfm.ie/" & @CRLF & _
"https://en.m.wikipedia.org/"
Local $sSubst = "$1$2$3"
Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst)
MsgBox($MB_SYSTEMMODAL, "Result", $sResult)
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