自上次写完随笔以来，2个多月没写啦，这次总结下几种工作中常用的排名。其实比较简单，我们争取用最少的代码实现功能。

准备数组：

$info = [
    ["id" => "a", "vote_num" => 7],
    ["id" => "b", "vote_num" => 3],
    ["id" => "c", "vote_num" => 3],
    ["id" => "d", "vote_num" => 7],
    ["id" => "e", "vote_num" => 2],
    ["id" => "f", "vote_num" => 5],
];

第一种：

常规排序：（根据数组的键值拿到排序）

array_multisort(array_column($info,'vote_num'),SORT_DESC,$info);
foreach ($info as $k=>&$item){
    $item['rank'] = $k+1;
}
echo  '<pre>';
print_r($info);