Online PHP editor | output for AnE56

<?php $arr = [ 0 => [ "model_id" => 1, "price" => 2000, ], 1 => [ "model_id" => 2, "price" => 3000, ], 2 => [ "model_id" => 1, "price" => 1500, ], ]; function array_column1($input, $column_key = null, $index_key = null) { $result = []; $i = 0; foreach ($input as $v) { $k = $index_key === null || !isset($v[$index_key]) ? $i++ : $v[$index_key]; $result[$k][] = $column_key === null ? $v : (isset($v[$column_key]) ? $v[$column_key] : null); } $result = array_map("min", $result); return $result; } $temp = array_column1($arr, 'price', 'model_id'); print_r($temp);