$re = '/(?=Bank)(.*)(?<=IBAN)/m';
$str = 'Hurtigruta Carglass AS\\r\\n1(1)\\r\\n(Ensjøvn. 17)\\r\\nPOSTBOKS 6452 ETTERSTAD\\r\\n0605 OSLO\\r\\nForetaksregisteret NO 985758220 MVA\\r\\nKunde 100454 Avdeling Alnabru\\r\\nBank\\r\\n4202 33 70055\\r\\nTRYG FORSIKRING\\r\\nIBAN NO77 4202 3370 055\\r\\nPostboks 7070\\r\\nSWIFT SPTRNO22\\r\\n5020 BERGEN\\r\\nTlf 98709500\\r\\nFax 22 70 76 01\\r\\nregnskap@hurtigruta.no\\r\\nDeres referanse\\r\\nwww.hurtigruta.no\\r\\nFAKTURA 14780866\\r\\nFakturadato 08.06.2019 Skadedato 07.06.2019\\r\\nForfallsdato 08.07.2019 Reg.nr. EK71995 Vår referanse Avdeling Alnabru\\r\\nKID147808661\\r\\nLeveringsdato 07.06.2019 Kundens ordrenr\\r\\n0000456218\\r\\nVarenr Varetekst Antall Pris % Sum\\r\\nRep av frontrute\\r\\n50 REP-1 1,0 STK 650,00 650,00\\r\\nm.v.a. av kr 650,00 162,50\\r\\nTotalsum: 812,50\\r\\nAvrunding 0,50\\r\\nSum å betale: 813,00\\r\\nBankkontonummer: 4202 33 70055\\r\\nBiler med fradragsrett for merverdiavgift, skal svare denne avgiften i tillegg til en eventuell egenandel.\\r\\nFor disse bilene dekker forsikringsselskapet kun netto faktura';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
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 PHP, please visit: http://php.net/manual/en/ref.pcre.php