php二维数组查询 根据字段值

$searchValue = 4;
            $fgs = array_filter($fgs_result, function($t) use ($searchValue) { return $t['grade'] == $searchValue; });
模糊查询可用

$fgs = array_filter($fgs_result, function($t) use ($searchValue) { return  strpos（$t['grade'] , $searchValue）; });