#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "(?xsm) (?=" & @CRLF & _
" ({%.if" & @CRLF & _
" (?:" & @CRLF & _
" (?>" & @CRLF & _
" (?:" & @CRLF & _
" (?! {%.if | endif.%}) ." & @CRLF & _
" )+" & @CRLF & _
" )*" & @CRLF & _
" | (?1)" & @CRLF & _
" )*" & @CRLF & _
" endif.%})" & @CRLF & _
" )" & @CRLF & _
" (?1)"
Local $sString = "not interested in" & @CRLF & _
"" & @CRLF & _
"{% if something %}" & @CRLF & _
" ----------------" & @CRLF & _
" {% if something %}" & @CRLF & _
" DEEPER" & @CRLF & _
" {% endif %}" & @CRLF & _
"{% irgendwas %}" & @CRLF & _
" {% if something %}" & @CRLF & _
" DEEPER" & @CRLF & _
" {% if something %}" & @CRLF & _
" DEEPEST" & @CRLF & _
" {% endif %}" & @CRLF & _
" DEEPER" & @CRLF & _
" {% endif %}" & @CRLF & _
" ---- endif ----" & @CRLF & _
"{% endif %}" & @CRLF & _
"" & @CRLF & _
"not interested in" & @CRLF & _
"" & @CRLF & _
"{% if otherthing %}" & @CRLF & _
" ++++++++++++++++" & @CRLF & _
" {% if something %}" & @CRLF & _
" DEEPER" & @CRLF & _
" {% endif %}" & @CRLF & _
"{% irgendwas %}" & @CRLF & _
" {% if something %}" & @CRLF & _
" DEEPER" & @CRLF & _
" {% if something %}" & @CRLF & _
" DEEPEST" & @CRLF & _
" {% endif %}" & @CRLF & _
" DEEPER" & @CRLF & _
" {% endif %}" & @CRLF & _
" ++++ endif ++++" & @CRLF & _
"{% endif %}" & @CRLF & _
"" & @CRLF & _
"not interested in"
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