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<?php // can be anything, even always false regex $regex = '~(?<=t)(?<=f)x()(?<named>y)~u'; // add one capturing group to the end so all capture group keys // are present in the $matches $regex = preg_replace('~^(.)(.*)\K(\1\w*$)~', '|()$3', $regex); var_dump($regex); preg_match($regex, '', $matches); print_r($matches);
Output for git.master, git.master_jit, rfc.property-hooks
string(32) "~(?<=t)(?<=f)x()(?<named>y)|()~u" Array ( [0] => [1] => [named] => [2] => [3] => )

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