我有这个数组,它已经按"名称"ASC排序。
array
0 =>
array
'id' => '4'
'name' => 'iPad'
'games' => 5
1 =>
array
'id' => '5'
'name' => 'iPhone'
'games' => 5
2 =>
array
'id' => '6'
'name' => 'Nintendo DS'
'games' => 5
3 =>
array
'id' => '1'
'name' => 'Playstation 2'
'games' => 2
4 =>
array
'id' => '7'
'name' => 'Playstation 3'
'games' => 2
5 =>
array
'id' => '7'
'name' => 'Xbox 360'
'games' => 1
如果"游戏"的值相同,我希望按"游戏"的值排序,同时尊重排序的"名称"的顺序。
结果应如下所示:
array
0 =>
array
'id' => '7'
'name' => 'Xbox 360'
'games' => 1
1 =>
array
'id' => '1'
'name' => 'Playstation 2'
'games' => 2
2 =>
array
'id' => '7'
'name' => 'Playstation 3'
'games' => 2
3 =>
array
'id' => '4'
'name' => 'iPad'
'games' => 5
4 =>
array
'id' => '5'
'name' => 'iPhone'
'games' => 5
5 =>
array
'id' => '6'
'name' => 'iPod Touch'
'games' => 5
我几乎尝试了所有排序函数和用户定义的比较函数,但找不到合适的。
如果可能的话,如果我想要"游戏"DESC,同时在游戏价值相同的情况下保持排序的"名称"ASC,我该如何处理它?例:
array
0 =>
array
'id' => '6'
'name' => 'Nintendo DS'
'games' => 5
1 =>
array
'id' => '5'
'name' => 'iPhone'
'games' => 5
2 =>
array
'id' => '4'
'name' => 'iPad'
'games' => 5
3 =>
array
'id' => '1'
'name' => 'Playstation 2'
'games' => 2
4 =>
array
'id' => '7'
'name' => 'Playstation 3'
'games' => 2
5 =>
array
'id' => '7'
'name' => 'Xbox 360'
'games' => 1
usort($array, function ($a, $b) {
if ($a['games'] == $b['games']) {
return strcmp($a['name'], $b['name']);
} else {
return $a['games'] - $b['games'];
}
});
还有其他使用自定义比较函数的方法,但最简单的方法是使用 array_multisort
。
首先使用要作为数组排序依据的键创建数组。然后向这些数组提供排序参数以array_multisort
。
// first collect the sorting keys
// ensure that $thearray[$n]['key'] corresponds to $sortkey[$n]
$games = array();
$name = array();
foreach ($thearray as $item) {
$games = $item['games'];
$name = $item['name'];
}
// now sort
array_multisort($games, SORT_NUMERIC, SORT_ASC,
$name, SORT_STRING, SORT_ASC,
$thearray);
// $thearray is now sorted first by games, then by name.