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<?php $data = [ ["a" => 2, "b" => 1, "c" => 3], ["a" => 1, "b" => 3, "c" => 2], ["a" => 1, "b" => 2, "c" => 3], ["a" => 2, "b" => 2, "c" => 3], ]; array_multisort( array_column($data, "a"), SORT_ASC, array_column($data, "b"), SORT_ASC, $data ); var_export($data);

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