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<?php preg_match_all('/(\((?>((?!<br>|[()]).)++|(?=\()(?1))*+\))/is', 'this () is a ( test ) right here ((l);;) so yea', $result); var_dump($result);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> array(3) { [0]=> string(2) "()" [1]=> string(8) "( test )" [2]=> string(7) "((l);;)" } [1]=> array(3) { [0]=> string(2) "()" [1]=> string(8) "( test )" [2]=> string(7) "((l);;)" } [2]=> array(3) { [0]=> string(0) "" [1]=> string(1) " " [2]=> string(1) ";" } }

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