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<?php $thearray = [ 123456 => 'John Doe', 654321 => 'Doe John' ]; var_export( array_map( fn($name, $code) => compact(['name', 'code']), $thearray, array_keys($thearray) ) );
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
array ( 0 => array ( 'name' => 'John Doe', 'code' => 123456, ), 1 => array ( 'name' => 'Doe John', 'code' => 654321, ), )

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