在php中根据字段对多维数组排序
我有如下所示的多维数组,我想在php中根据在php中根据字段对多维数组排序,php,arrays,sorting,multidimensional-array,Php,Arrays,Sorting,Multidimensional Array,我有如下所示的多维数组,我想在php中根据[name]字段进行排序 Array ( [chicago] => Array ( [community_name] => Chicago, IL [areas] => Array ( [0] => Array (
[name]
字段进行排序
Array
(
[chicago] => Array
(
[community_name] => Chicago, IL
[areas] => Array
(
[0] => Array
(
[name] => Array
(
[0] => HELLO WORLD.
)
)
[1] => Array
(
[name] => Array
(
[0] => Hello
)
)
[2] => Array
(
[name] => Array
(
[0] => Administration.
)
)
)
)
[chicago-and-surrounding-areas] => Array
(
[community_name] => Chicago (and surrounding areas), IL
[areas] => Array
(
[0] => Array
(
[name] => Array
(
[0] => Carry.
)
)
[1] => Array
(
[name] => Array
(
[0] => Bacteria.
)
)
)
)
[cambridge-chicago] => Array
(
[community_name] => Cambridge (Chicago), IL
[areas] => Array
(
[0] => Array
(
[name] => Array
(
[0] => Responsibility.
)
)
[1] => Array
(
[name] => Array
(
[0] => Bacteria.
)
)
)
)
)
这就是我想要实现的目标:
Array
(
[chicago] => Array
(
[community_name] => Chicago, IL
[areas] => Array
(
[0] => Array
(
[name] => Array
(
[0] => Administration
)
)
[1] => Array
(
[name] => Array
(
[0] => Hello
)
)
[2] => Array
(
[name] => Array
(
[0] => HELLO WORLD.
)
)
)
)
[chicago-and-surrounding-areas] => Array
(
[community_name] => Chicago (and surrounding areas), IL
[areas] => Array
(
[0] => Array
(
[name] => Array
(
[0] => Bacteria.
)
)
[1] => Array
(
[name] => Array
(
[0] => Carry.
)
)
)
)
[cambridge-chicago] => Array
(
[community_name] => Cambridge (Chicago), IL
[areas] => Array
(
[0] => Array
(
[name] => Array
(
[0] => Bacteria.
)
)
[1] => Array
(
[name] => Array
(
[0] => Responsibility.
)
)
)
)
)
这是我已经尝试过的,但我认为还需要做更多的工作
function cmp($a, $b)
{
if ($a["name"] == $b["name"]) {
return 0;
}
return ($a["name"] < $b["name"]) ? -1 : 1;
}
usort($response,"cmp");
函数cmp($a,$b)
{
如果($a[“名称”]==b[“名称”]){
返回0;
}
报税表($a[“姓名]<$b[“姓名])?-1:1;
}
usort($响应,“cmp”);
问题陈述:
我想知道我需要在上面的php代码中做些什么更改,以便它根据
name
字段对数组进行排序。上面的php代码没有对任何内容进行排序。它只是按原样打印输入。根据您的示例,您实际上是在尝试对区域
子数组进行排序,而不是对整个父数组进行排序。因此,您需要依次遍历每个子数组,并分别对它们进行排序
$array = [
'chicago' => [
'community_name' => 'Chicago, IL',
'areas' => [
[
'name' => ['HELLO WORLD.']
],
[
'name' => ['Hello'],
],
[
'name' => ['Administration.'],
],
],
],
'chicago-and-surrounding-areas' => [
'community_name' => 'Chicago (and surrounding areas), IL',
'areas' => [
[
'name' => ['Carry.']
],
[
'name' => ['Bacteria.'],
],
],
],
'cambridge-chicago' => [
'community_name' => 'Cambridge (Chicago), IL',
'areas' => [
[
'name' => ['Responsibility.']
],
[
'name' => ['Bacteria'],
],
],
],
];
foreach ($array as &$locality) {
usort($locality['areas'], function ($a, $b) {
return $a['name'][0] <=> $b['name'][0];
});
}
var_dump($array);
$array=[
“芝加哥”=>[
“社区名称”=>“伊利诺伊州芝加哥”,
“区域”=>[
[
“名称”=>[“你好,世界”。]
],
[
'name'=>['Hello'],
],
[
“名称”=>[“管理”。],
],
],
],
“芝加哥及周边地区”=>[
“社区名称”=>“伊利诺伊州芝加哥(及周边地区)”,
“区域”=>[
[
“名称”=>[“进位”。]
],
[
“名称”=>[“细菌”。],
],
],
],
“剑桥芝加哥”=>[
“社区名称”=>“伊利诺伊州剑桥(芝加哥)”,
“区域”=>[
[
“名称”=>[“责任”。]
],
[
“名称”=>[“细菌”],
],
],
],
];
foreach($array as&$locality){
usort($Location['areas'),函数($a,$b){
返回$a['name'][0]$b['name'][0];
});
}
变量转储($数组);
我看了一下代码,看起来不错。我想知道为什么
HELLO WORLD
会在HELLO
之前出现。想法?因为H
被认为比H
的值低<代码>变量转储('H'<'H');//是的。我还有一个问题。我做了一点修改。在其中,我添加了一些重音字符词。我想知道我需要对fiddle中的代码做些什么更改,以便它在排序时忽略重音字符。在o/p中,Aṕple
应位于Avocados
之前。您可以使用iconv()
函数转换字符编码。看这个。这完全取决于你使用的字符。UTF-8(它是什么)可以处理所有角色。您现在使用的是拉丁字符的子集。如果$response是您的数组,那么它的元素没有'name'键,它们的键是'comunity…','area',等等。您的意思是foreach($response as$town){usort($town['areas','cmp');}
或者类似的东西?您的cmp函数还应该比较$a['name'][0]==$b['name'][0]
。。。