#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "[Nn]issan(?=[^<>]*<)(?!(?:(?!</?(?:a|span)[ >/])(?:.|\n))*</(?:a|span)>)"
Local $sString = "Nissan" & @CRLF & _
"nissan" & @CRLF & _
"<span>Nissan</span>" & @CRLF & _
"<a href="nissan.com">Nissan</a>" & @CRLF & _
"<a href="nissan.com"><span>Nissan</span></a>" & @CRLF & _
"Company Nissan is a name. and Nissan Micra is model name. " & @CRLF & _
"Company <a href="nissan.com"><span>Nissan</span></a> is a name. and Nissan Micra is model name. " & @CRLF & _
"This is new <a href='https://www.url.com'><span>URL</span></a>.<br /> Company Nissan is a name. and Nissan Micra is model name. </p>" & @CRLF & _
"" & @CRLF & _
"<p>Company Nissan is a name Company Nissan is a name. Company Nissan is a name and <a href='www.nnm.be'><main>New Nissan Micra</main></a> is model name.</p>" & @CRLF & _
"" & @CRLF & _
"<a>nissan </a>" & @CRLF & _
"<a>nissan" & @CRLF & _
"</a>" & @CRLF & _
"" & @CRLF & _
"<a>nissan<span></span><a>" & @CRLF & _
"<a foo="nissan" bar="<">text<a>"
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