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<?php $array = [ ['record' => 1, 'sponsor' => 2, 'email' => 'some@email.com'], ['record' => 2, 'sponsor' => 2, 'email' => 'some1@email.com'], ['record' => 3, 'sponsor' => 2, 'email' => 'some2@email.com'], ['record' => 4, 'sponsor' => 2, 'email' => 'some3@email.com'], ]; $lookup = array_column($array, 'email', 'record'); var_export( array_map(fn($row) => $row += ['sponsor' => $lookup[$row['sponsor']]], $array) );
Output for rfc.property-hooks, git.master, git.master_jit
array ( 0 => array ( 'record' => 1, 'sponsor' => 2, 'email' => 'some@email.com', ), 1 => array ( 'record' => 2, 'sponsor' => 2, 'email' => 'some1@email.com', ), 2 => array ( 'record' => 3, 'sponsor' => 2, 'email' => 'some2@email.com', ), 3 => array ( 'record' => 4, 'sponsor' => 2, 'email' => 'some3@email.com', ), )

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