#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "[\\]"
Local $sString = "<li class=\"product-col\"><div class=\"product-inner\"><div class=\"product-image\"><a href=\"https:\/\/test.com\/\"><img width=\"300\" height=\"300\" src=\"https:\/\/test.com\/imgs\/uploads\/00894771000341_front-300x300.jpg\" class=\"img-fluid\" alt=\"\"></a></div>Test Product</div></li>"
Local $sSubst = ""
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