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<?php $subject = "text text text text [helloo] text [hello2] (hello3) text"; $pattern = '/\[(.+?)\]/is'; preg_match_all($pattern, $subject, $matches); print_r($matches);
Output for 4.3.0 - 7.1.0
Array ( [0] => Array ( [0] => [helloo] [1] => [hello2] ) [1] => Array ( [0] => helloo [1] => hello2 ) )