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<?php $string = "2=OK, 3=OK" ; preg_match_all('!\d+!', $string, $matches); $res = array_combine($matches[0], str_word_count($string, 1)); print_r($res);
Output for 7.1.25 - 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Array ( [2] => OK [3] => OK )

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