#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "(?m)(PI~)([0-9]*)"
Local $sString = "MSH|^~\&|EPIC|UMCG|||20180927143440||ADR^A19|18093|P|2.4|||||||||||" & @CRLF & _
"MSA|CA|20180927023440||" & @CRLF & _
"QRD|20180927|R|I|20180927|||1^RD|1414141|DEM" & @CRLF & _
"EVN|A19|20180927143440|||^^^^^^^^^^^^^||" & @CRLF & _
"PID|1||1414141^^^UMCG^PI~109819226||PROEFPERSOON&&PROEFPERSOON^J^X Y Z^^^^L^^^^NL1~PROEFPERSOON&&PROEFPERSOON^PIET^^^^^N^^^^NL1||19700101|M|PROEFPERSOON^PIET^^||PROEFLAAN 1C&PROEFLAAN&1C^^GRONINGEN^^9713GZ^NLD^L||050-1234567^P^PH^^^050^1234567~^NET^Internet^PIET@PROEFPERSOON.com~06-12345678^P^CP^^^06^12345678|06-87654321^P^PH^^^06^87654321|NEDERLANDS|||19764||||||Y||||||N||" & @CRLF & _
"ROL|1|UP|PP^Primary Care Provider|01001234^Huisarts^H^^^^^^Vektis^L|||||01^Huisartsen^Vektis||Straatweg 2&Straatweg&2^^Groningen^^9723AA^^O|050-3134102^WPN^PH~^NET^X.400^800013630" & @CRLF & _
"PV1|1|I|UG_V_A1VA^4^4-1^10^^^^^UMCG A1VA^^DEPID|NB||||||||||WOON|||||19764|CZ||||||||||||||||||||||||20180926143019||||||99996||||" & @CRLF & _
"AL1|1|SYSTEMISCH|^GEEN BEKENDE ALLERGIEEN^||||||" & @CRLF & _
"IN1|1||7119^^^UZOVI^PAYORID|CZ GROEP ZORGVERZEKERAAR UA (7119)|POSTBUS 4400&POSTBUS 4400&^^GOES^^4460CZ^||0113-274727^^^^^0113^274727|||||||||PROEFPERSOON^J^X Y Z.^^|Zelf|||Accepteren||1|||Ja||||||||||2552|ABC0123|||||||||||BEIDE||" & @CRLF & _
"IN2|||||Verzekeraar||||||||||||||||||||||||||||||||||||||||||||||||||||||||ABC0123|||||||||" & @CRLF & _
"L|1|UP|PP^Primary Care Provider|01001234^Huisarts^H^^^^^^Vektis^L|||||01^Huisartsen^Vektis||Straatweg 2&Straatweg&2^^Groningen^^9723AA^^O|050-3134102^WPN^PH~^NET^X.400^800013630" & @CRLF & _
""
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