laravel二维数组多条件排序解决方式

方式1 根据集合拼接key去排序

$results_product &＃61; [[&＃39;create_time&＃39; &＃61;> &＃39;2018-10-10 10:25:05&＃39;, &＃39;downloaded&＃39; &＃61;> 20, &＃39;product_id&＃39; &＃61;> 1],[&＃39;create_time&＃39; &＃61;> &＃39;2018-10-10 10:20:05&＃39;, &＃39;downloaded&＃39; &＃61;> 50, &＃39;product_id&＃39; &＃61;> 2],[&＃39;create_time&＃39; &＃61;> &＃39;2018-10-10 10:20:05&＃39;, &＃39;downloaded&＃39; &＃61;> 50, &＃39;product_id&＃39; &＃61;> 4],[&＃39;create_time&＃39; &＃61;> &＃39;2018-10-10 10:20:05&＃39;, &＃39;downloaded&＃39; &＃61;> 70, &＃39;product_id&＃39; &＃61;> 3]];$result &＃61; collect($results_product)->map(function($data){$data[&＃39;sort&＃39;] &＃61; $data[&＃39;create_time&＃39;].&＃39;_&＃39;.$data[&＃39;downloaded&＃39;].&＃39;_&＃39;.$data[&＃39;product_id&＃39;];return $data;})->sortByDesc(&＃39;sort&＃39;)->toArray();dd($result);


不方便的就是只能单向排序 如果是 字段1 升序 字段2 降序 就不太好处理了

foreach ($results_product as $key &＃61;> $row) {$create_time[$key] &＃61; $row[&＃39;create_time&＃39;];$downloaded[$key] &＃61; $row[&＃39;downloaded&＃39;];$product_id[$key] &＃61; $row[&＃39;product_id&＃39;];}array_multisort($create_time, SORT_DESC, $downloaded, SORT_DESC, $product_id, SORT_DESC, $results_product);

方式3 &＃xff08;误区-该方法不行&＃xff0c;多字段切勿使用&＃xff09;

$results_product2 &＃61; collect($results_product);$results_product2 &＃61; $results_product2->sortByDesc(&＃39;create_time&＃39;)->sortByDesc(&＃39;downloaded&＃39;)->sortByDesc(&＃39;product_id&＃39;);