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<?php $input = "(Field1 = 'Val and ue1') and (Field2 = 'Valu or e2') or (Field3 = 'Value3')"; preg_match_all("~\((\S+ = '.*?')\) ?(or|and)?~", $input, $m, PREG_SET_ORDER); print_r($m);
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
Array ( [0] => Array ( [0] => (Field1 = 'Val and ue1') and [1] => Field1 = 'Val and ue1' [2] => and ) [1] => Array ( [0] => (Field2 = 'Valu or e2') or [1] => Field2 = 'Valu or e2' [2] => or ) [2] => Array ( [0] => (Field3 = 'Value3') [1] => Field3 = 'Value3' ) )

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31.41 ms | 1138 KiB | 7 Q