如何在多维数组中按键排序

Question

我制作了这个虚构的会员名单。我想保持子数组(类年)的顺序，同时按每个子数组内的降序键排序。

$pledges = array(
  'smith'     => "Joe Patterson",
  'jones'     => "Robert Nelson",
  'davis'     => "Jimmy Davis",
  'carpenter' => "Mike Carpenter");
$sophomores = array(
  'ford'      => "Kevin Ford",
  'gomez'     => "Pedro Gomez",
  'miller'    => "Jack Miller",
  'pullman'   => "Lucas Pullman");
$juniors = array(
  'bradford'  => "Nicholas Bradford",
  'daniels'   => "Robert Daniels",
  'soren'     => "Jon Soren",
  'cooper'    => "Harrison Cooper");
$seniors = array(
  'mcdonald'  => "Casey McDonald",
  'witten'    => "Tim Witten",
  'session'   => "Benjamin Sessions",
  'redding'   => "Jack Redding");

我该怎么做?谢谢。

Answer 1

PHP手册中有一个很好的例子。

http://www.php.net/manual/en/function.ksort.php 98465

Answer 2

使用PHP的ksort函数可以对数组键进行排序。

ksort($pledges);
array_reverse($pledges);
and like wise for others....

你发布的是单维度数组，请注意ksort将只适用于单维度数组。