<?php $array = [ [ 'division' => 'Mymensingh', 'A' => 1 ], [ 'division' => 'Dhaka', 'A' => 5 ], [ 'division' => 'Mymensingh', 'B' => 2, 'C' => 5 ] ]; var_export( array_values( array_reduce( $array, function($result, $row) { $result[$row['division']] = ($result[$row['division']] ?? []) + $row; return $result; }, [] ) ) );
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