#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "(?m)^(?:(?:(?:(?:(?:[13579][26]|[2468][048])00)|(?:[0-9]{2}(?:(?:[13579][26])|(?:[2468][048]|0[48]))))(?:(?:(?:09|04|06|11)(?:0[1-9]|1[0-9]|2[0-9]|30))|(?:(?:01|03|05|07|08|10|12)(?:0[1-9]|1[0-9]|2[0-9]|3[01]))|(?:02(?:0[1-9]|1[0-9]|2[0-9]))))|(?:[0-9]{4}(?:(?:(?:09|04|06|11)(?:0[1-9]|1[0-9]|2[0-9]|30))|(?:(?:01|03|05|07|08|10|12)(?:0[1-9]|1[0-9]|2[0-9]|3[01]))|(?:02(?:[01][0-9]|2[0-8])))))(([_]{1})[a-zA-Z-zÀ-ÿ-0-9\s]+?(?=_)([_]{1})(([0-9]+?(?=[.]))|([0-9]+?(?=[_])([_]{1})[a-zA-Z-zÀ-ÿ-0-9\s]+?(?=[.]))|([a-zA-Z-zÀ-ÿ-0-9\s]+?(?=_)([_]{1})(([0-9]+?(?=[.]))|([0-9]+?(?=_)([_]{1})[a-zA-Z-zÀ-ÿ-0-9\s]+?(?=[.]))))))"
Local $sString = "" & @CRLF & _
"20220103" & @CRLF & _
"20220103_type_67676.txt" & @CRLF & _
"20220103_ty ççpe_67676.txt" & @CRLF & _
"20220103_typ çw3434ç sdf ççe_67676.txt" & @CRLF & _
"20220103_type_sousType_67676.txt" & @CRLF & _
"20220103_type_sousType_67676_test.txt" & @CRLF & _
"20220103_tyéàààçççççééééêê432èèèè èïÜüïîÛÜÄçpe_67676.txt" & @CRLF & _
"20220103_tééééêê432èèype_sééééêê432èèsousType_67676.txt" & @CRLF & _
"20220103_tééééêê432èèype_sééééêê432èèsousType_67676_libre.txt" & @CRLF & _
"20211231_CA_80001_champ libre.txt" & @CRLF & _
"20220103_"
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