Question

可能重复：
  How can I sort arrays and data in PHP?
  How do I sort a multidimensional array in php
  PHP Sort Array By SubArray Value
  PHP sort multidimensional array by value

我的数组看起来像：

Array(
    [0] => Array(
         [name] => Bill
         [age] => 15
    ),
    [1] => Array(
         [name] => Nina
         [age] => 21
    ),
    [2] => Array(
         [name] => Peter
         [age] => 17
    )
);

我想根据他们的名字按字母顺序对它们进行排序。我看到了PHP Sort Array By SubArray Value，但没有多大帮助。任何想法如何做到这一点？

Answer 1

这是你的答案，它100％有效，我已经测试过了。

<?php
$a = Array(
    1 => Array(
         'name' => 'Peter',
         'age' => 17
    ),
    0 => Array(
         'name' => 'Nina',
         'age' => 21
    ),
    2 => Array(
         'name' => 'Bill',
         'age' => 15
    ),
);
function compareByName($a, $b) {
  return strcmp($a["name"], $b["name"]);
}
usort($a, 'compareByName');
/* The next line is used for debugging, comment or delete it after testing */
print_r($a);

Answer 2

usort是你的朋友：

function cmp($a, $b)
{
        return strcmp($a["name"], $b["name"]);
}

usort($array, "cmp");

PHP使用子数组值按字母顺序排序数组

2 个答案: