<?php $summary = [ "person1" => [ 'question1' => '3', 'question2' => '5' ], "person2" => [ 'question1' => '2', 'question2' => '3' ], "person3" => [ 'question1' => '1', 'question2' => '2' ] ]; var_export( array_map(fn($questions) => ['questions' => array_sum($questions)], $summary) );
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