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<?php $array = array('Dogs/Cats', 'Dogs/Cats/Mice', 'ANIMALS/SPECIES Dogs/Cats/Mice', '(Animals/Species) Dogs/Cats/Mice'); $re = '~(?:^(?:\(\w+/\w+\)\h+|[A-Z]+/[A-Z]+\h+)?|\G(?!^))\w+\K/~'; $array = preg_replace($re, " or ", $array); print_r($array);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Dogs or Cats [1] => Dogs or Cats or Mice [2] => ANIMALS/SPECIES Dogs or Cats or Mice [3] => (Animals/Species) Dogs or Cats or Mice )

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