<?php $array = [ 2400 => [ ['value' => 7, 0 => 7], ['value' => 61, 0 => 61], ['value' => 42, 0 => 42], ['value' => null, 0 => null], ], 2401 => [ ['value' => null, 0 => null], ['value' => 66, 0 => 66], ['value' => null, 0 => null], ['value' => 21, 0 => 21], ] ]; var_export( array_map( fn($row) => array_filter($row, 'array_sum'), $array ) );
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