#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "APIDETAILS=(.*?)(?=}|,\s*\S+=|$)"
Local $sString = "{APIDETAILS=FOO, BAR, SING, RUN, OP1/OPSUB1/RESULT=SOMETHING, OP1/OPSUB2/RESULT=SOMETHING, OP2/OPSUB1/RESULT=SOMETHING}" & @CRLF & _
"{APIDETAILS=FOO, OP1/OPSUB1/RESULT=SOMETHING, OP1/OPSUB2/RESULT=SOMETHING, OP2/OPSUB1/RESULT=SOMETHING}" & @CRLF & _
"{APIDETAILS=FOO, O.P.OP3/OPSUB1/RESULT=SOMETHING, OP1/OPSUB2/RESULT=SOMETHING, OP2/OPSUB1/RESULT=SOMETHING}" & @CRLF & _
"{APIDETAILS=FOO, OP.PO.OP4/OPSUB1/RESULT=SOMETHING, OP1/OPSUB2/RESULT=SOMETHING, OP2/OPSUB1/RESULT=SOMETHING}" & @CRLF & _
"{OP1/OPSUB1/RESULT=SOMETHING, OP1/OPSUB2/RESULT=SOMETHING, OP2/OPSUB1/RESULT=SOMETHING, APIDETAILS=FOO}" & @CRLF & _
"{OP1/OPSUB1/RESULT=SOMETHING, OP1/OPSUB2/RESULT=SOMETHING, OP2/OPSUB1/RESULT=SOMETHING, APIDETAILS=FOO, SING, BAR}" & @CRLF & _
"{OP1/OPSUB1/RESULT=SOMETHING, OP1/OPSUB2/RESULT=SOMETHING, OP2/OPSUB1/RESULT=SOMETHING, APIDETAILS=FOO, BAR, SING"
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