[英]Group values in multi-dimensional array based on a key
I have the following multi-dimensional array:我有以下多维数组:
Array
(
[0] => Array
(
[sname] => florida
[cname] => orlando
)
[1] => Array
(
[sname] => texas
[cname] => dallas
)
[2] => Array
(
[sname] => florida
[cname] => tampa
)
[3] => Array
(
[sname] => ohio
[cname] => columbus
)
)
How would I go about trying to get all ' cname ' values associated with each ' sname ' value?我将如何尝试获取与每个“ sname ”值相关联的所有“ cname ”值?
florida: orlando, tampa
texas: dallas
ohio: columbus
With a slight tweak of Mike's solution ( https://stackoverflow.com/a/2189916/4954574 ), the following will produce what I was hoping for:稍微调整 Mike 的解决方案( https://stackoverflow.com/a/2189916/4954574 ),以下将产生我所希望的:
$input_arr = array(
array("sname" => "florida", "cname" => "orlando"),
array("sname" => "texas", "cname" => "dallas"),
array("sname" => "florida", "cname" => "tampa"),
array("sname" => "ohio", "cname" => "columbus")
);
foreach ($input_arr as $key => &$entry) {
$level_arr[$entry['sname']][$key] = $entry['cname'];
}
print_r($level_arr);
Output:输出:
Array
(
[florida] => Array
(
[0] => orlando
[2] => tampa
)
[texas] => Array
(
[1] => dallas
)
[ohio] => Array
(
[3] => columbus
)
)
There are probably several ways to do this.可能有几种方法可以做到这一点。 The one that comes to mind is something like this:想到的是这样的:
<?php
$payload = [];
$origin = [
[
'sname' => 'florida',
'cname' => 'orlando'
],
[
'sname' => 'texas',
'cname' => 'dallas'
],
[
'sname' => 'florida',
'cname' => 'tampa'
],
[
'sname' => 'ohio',
'cname' => 'columbus'
]
];
foreach ($origin as $value) {
if (! isset($payload[$value['sname']])) {
$payload[$value['sname']] = '';
}
$payload[$value['sname']] .= (strlen($payload[$value['sname']]) >0?',':'') . $value['cname'];
}
print_r($payload);
Cheers!干杯! :) :)
=C= =C=
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.