<?php $input = "(Field1 = 'Val and ue1') and (Field2 = 'Valu or e2') or (Field3 = 'Value3')"; var_export(preg_split("~^\(|\)$|\) (and|or) \(~", $input, 0, PREG_SPLIT_NO_EMPTY|PREG_SPLIT_DELIM_CAPTURE));
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