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<?php $string = "23 asdasdasdasd.sma(33) asda sdas asd 23 2 3 54232 23d asd"; $reg = '/\(\K\d+(?=\))/'; preg_match($reg, $string, $matches); var_dump($matches);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
array(1) { [0]=> string(2) "33" }

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