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<?php $array = [ ["user", "date", "md5", "sha1"], ["user1", "02/02/15", "123456", "54321"], ["user1", "02/03/15", "123456", "54321"], ["user2", "02/02/15", "112233", "332211"], ["user2", "02/03/15", "112244", "332244"] ]; $result = []; foreach ($array as [$user, $date, $md5, $sha1]) { $result[$user][$date] = [$md5, $sha1]; } var_export($result);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 'user' => array ( 'date' => array ( 0 => 'md5', 1 => 'sha1', ), ), 'user1' => array ( '02/02/15' => array ( 0 => '123456', 1 => '54321', ), '02/03/15' => array ( 0 => '123456', 1 => '54321', ), ), 'user2' => array ( '02/02/15' => array ( 0 => '112233', 1 => '332211', ), '02/03/15' => array ( 0 => '112244', 1 => '332244', ), ), )

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