Online PHP editor | refs for tF8sM

<?php $stens = [ 'realistic' => [ 's1' => [10], 's2' => [11,12], 's3' => [13,14,15,16], 's4' => [17,18,19,20,21], 's5' => [22,23,24,25,26,27,28,29], 's6' => [30,31,32,33,34,35,36], 's7' => [37,48,39,40,41], 's8' => [42,43,44,45,46,47], 's9' => [48,49], 's10' => [50], ], 'research' => [ 's1' => [10,11,12,13,14], 's2' => [15], 's3' => [16,17,18,19,20], 's4' => [21,22,23,24,25,26,27,28], 's5' => [29,30,31,32,33], 's6' => [34,35,36,37,38], 's7' => [39,40,41,42], 's8' => [43,44,45,46,47], 's9' => [48,49], 's10' => [50], ], ]; $raw_data = [ 'realistic' => 18, 'research' => 43, ]; $result = []; foreach ($raw_data as $k => $v) { $result[$k] = array_find_key( $stens[$k], fn($s) => in_array($v, $s) ); } var_export($result);