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<?php $string = 'asdf'; preg_match('/.(?<secondAndThird>(?<second>.)(.))(?<fourth>.)/n', $string, $m); var_export($m);
Output for git.master_jit, git.master, rfc.property-hooks
array ( 0 => 'asdf', 'secondAndThird' => 'sd', 1 => 'sd', 'second' => 's', 2 => 's', 'fourth' => 'f', 3 => 'f', )

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