<?php $arr = [ 65 => [ ["p" => 234, "sp" => 234], ["p" => 53, "sp" => 5], ["p" => 530, "sp" => 5], ] ]; $col = 'p'; // set the column you want to order on $column = array_column($arr[65], $col); array_multisort($column, SORT_ASC, $arr[65]); // SORT_ASC or SORT_DESC $arr[65] = $arr[65][0]; // only keep the record with lowest 'p' value var_dump($arr);
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