<?php $array = [ 7 => [ 0 => 1, 1 => 34, 2 => 181, 3 => 50, ], 9 => [ 0 => 1, 1 => 2, 2 => 1, 3 => 47, ], 2 => [ 0 => 20, 1 => 0, 2 => 1621, 3 => 45, ], 3 => [ 0 => 120, 1 => 0, 2 => 121, 3 => 45, ], ]; var_export( array_filter($array, array_product(...)) );
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