<?php $a = array( 0 => array( 'id' => 1, 'name' => 'john' ), 1 => array( 'id' => 28, 'name' => 'peter' ) ); var_export( array_reduce( $a, fn($result, $row) => array_replace($result, [$row['id'] => ['name' => $row['name']]]), [] ) );
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