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<?php $map = [ 'sys_a_1' => 'sys_b_1', 'sys_a_2' => 'sys_b_2', ]; $data = [ 'sys_a_1' => 'data_1', 'sys_a_2' => 'data_2', ]; $result = array_combine($map,$data); print_r($result);

preferences:
26.96 ms | 405 KiB | 5 Q