按多个键按特定顺序对数组进行排序

本文介绍了按多个键按特定顺序对数组进行排序的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想按以下顺序按多个键对以下数组进行排序:首先按类型"，然后按产品"，最后按名称".使用usort可以很容易地做到这一点，尽管我的客户希望按特定顺序对产品"进行排序:订书机，装订机，书本.

I want to sort the following array by multiple keys in the following order: First by "type", then "product", and lastly by "name". This is pretty easily done with usort, although my clients wants "product" sorted in a specific order: Stapler, Binder, Book.

$arr = array( array( 'type' => 'School', 'product' => 'Book', 'name' => 'My book', 'data' => '...' ), array( 'type' => 'Job', 'product' => 'Stapler', 'name' => 'My stapler', 'data' => '...' ), array( 'type' => 'Personal', 'product' => 'Binder', 'name' => 'My binder', 'data' => '...' ), array( 'type' => 'School', 'product' => 'Book', 'name' => 'My book', 'data' => '...' ) );

有人知道实现此目标的聪明方法吗?

Does anyone know a clever way to accomplish this?

推荐答案

usort($arr, function ($a, $b) { // by type $r = strcmp($a['type'], $b['type']); if ($r !== 0) { return $r; } // by product // note: one might want to check if `$a/$b['product']` really is in `$order` $order = array('Stapler', 'Binder', 'Book'); $r = array_search($a['product'], $order) - array_search($b['product'], $order); if ($r !== 0) { return $r; } // or similar, with a little help by @fab ;) /* $order = array('Stapler' => 0, 'Binder' => 1, 'Book' => 2); $r = $order[$a['product']] - $order[$b['product']]; if ($r !== 0) { return $r; } */ // name return strcmp($a['name'], $b['name']); });