When was the /e modifier added to PHP?

On PHP 3.0.16 / Apache CGI / Win32 it does not work, but on PHP 4.0.2 / Apache Module / Linux it does work. Is this a platform issue, or a version issue?

Are there any workarounds if this is a version issue?

Thanks,
John

Code sample:

      $searcharray = array(
        "/(\[)(list)(=)(['\"]?)([^\"']*)(\\4])(.*)(\[\/list\])/esiU",
        "/(\[)(list)(])(.*)(\[\/list\])/esiU",
        "/(\[)(url)(=)(['\"]?)([^\"']*)(\\4])(.*)(\[\/url\])/esiU",
        "/(\[)(url)(])(.*)(\[\/url\])/esiU",
        "/(\[)(code)(])(\r\n)*(.*)(\[\/code\])/esiU"
      );

      $replacearray = array(
        "createlists('\\7', '\\5')",
        "createlists('\\4')",
        "checkurl('\\5', '\\7')",
        "checkurl('\\4')",
        "stripbrsfromcode('\\5')"
      );

      $bbcode=preg_replace($searcharray, $replacearray, $bbcode);