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<?php $rotor = ["A" => "R", "B" => "D", "C" => "O", "D" => "B"]; $from = "C"; foreach (array_keys($rotor) as $index => $key) { if ($key === $from) { $rotor = array_slice($rotor, $index, null, true) + $rotor; break; } } var_export($rotor);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 'C' => 'O', 'D' => 'B', 'A' => 'R', 'B' => 'D', )

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