PHP - assoc命令数组中的数组排序 [英] PHP - sort arrays within assoc array

问题描述

的我答应你，我有一个关于PHP排序，包括看许多现有的SO QS <一个href=\"http://stackoverflow.com/questions/17364127/reference-all-basic-ways-to-sort-arrays-and-data-in-php\">this大型之一的

我有一个PHP关联数组，字符串作为键。每个值是整数数组。我想整数每个阵列，在简单的升序数字顺序排序。我相信这应该是很容易的，我已经找到足够的例子，我认为我应该做正确的事，但它并不完全工作，所以有一个错字或我是白痴或东西...

I've got a PHP associative array, with strings as keys. Each value is an array of integers. I want to sort each array of integers, in simple ascending numerical order. I'm convinced this should be easy, and I've found enough examples that I think I should be doing the right thing, but it's not quite working, so there's a typo or I'm an idiot or something...

PHP：

//Each fruit corresponds to an array (series) of integers
$data = [
    'banana' => [
        1,3,2
    ],
    'orange' => [
        5,1,3
    ]
];

echo "Before sort:\n";
var_dump($data);

//For each fruit, I want to order the numbers
foreach ($data as $key => $series)
{
    //Sort array of integers
    sort($series);

    //NB I wasn't sure about value/reference details of foreach loops, so I also tried
    //retrieving a series into a variable, sorting, and then reassigning back to the same key
}

echo "\n\nAfter sort:\n";
var_dump($data);

输出：

Before sort:
array(2) {
  'banana' =>
  array(3) {
    [0] =>
    int(1)
    [1] =>
    int(3)
    [2] =>
    int(2)
  }
  'orange' =>
  array(3) {
    [0] =>
    int(5)
    [1] =>
    int(1)
    [2] =>
    int(3)
  }
}


After sort:
array(2) {
  'banana' =>
  array(3) {
    [0] =>
    int(1)
    [1] =>
    int(3)
    [2] =>
    int(2)
  }
  'orange' =>
  array(3) {
    [0] =>
    int(5)
    [1] =>
    int(1)
    [2] =>
    int(3)
  }
}

正如你所看到的，在输出整数数组内未进行排序。我究竟做错了什么？ （PHP 5.5.9，Windows 7中）

As you can see, in the output the inner arrays of integers have not been sorted. What am I doing wrong? (PHP 5.5.9, Windows 7)

推荐答案

使用参考＆安培; ：

foreach ($data as $key => &$series)
{
    //Sort array of integers
    sort($series);
    // OR
    // sort($data[$key]);
}

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