我有一个要排序的复杂数组，它看起来像这样：
Array
(
[0] => Array
(
[id] => 1171409310
[parent] => 1171287657
[createdAt] => 2013-12-20T12:42:19
)
[1] => Array
(
[id] => 1171360372
[parent] => 1171313704
[createdAt] => 2013-12-20T11:18:46
)
[2] => Array
(
[id] => 1171313704
[parent] => 1171304353
[createdAt] => 2013-12-20T10:14:46
)
[3] => Array
(
[id] => 1171304353
[parent] => 1171287657
[createdAt] => 2013-12-20T09:55:34
)
[4] => Array
(
[id] => 1171303539
[parent] => 1171014482
[createdAt] => 2013-12-20T09:53:54
)
[5] => Array
(
[id] => 1171287657
[parent] => 1170597579
[createdAt] => 2013-12-20T09:29:34
)
[6] => Array
(
[id] => 1171264520
[parent] => 1169354287
[createdAt] => 2013-12-20T08:58:26
)
[7] => Array
(
[id] => 1171014482
[parent] =>
[createdAt] => 2013-12-20T02:51:24
)
[8] => Array
(
[id] => 1170700661
[parent] => 1170597579
[createdAt] => 2013-12-19T21:30:31
)
[9] => Array
(
[id] => 1170597579
[parent] =>
[createdAt] => 2013-12-19T20:22:40
)
[10] => Array
(
[id] => 1169362457
[parent] =>
[createdAt] => 2013-12-18T22:27:28
)
[11] => Array
(
[id] => 1169354287
[parent] =>
[createdAt] => 2013-12-18T22:20:08
)
[12] => Array
(
[id] => 1169315244
[parent] =>
[createdAt] => 2013-12-18T21:52:59
)
)
我希望数组首先按日期排序（最旧的在顶部），然后每个子节点在其父节点之后（最顶层的节点也是如此）。问题是孩子也可能是有孩子的父母，因此有多个维度。如果可能，我还想添加尺寸。
我希望我的问题很明确。
编辑：我从disqus API获取数组，并希望它像在网站上一样排序。
编辑：它必须像这样结束：Array
(
[12] => Array
(
[id] => 1169315244
[parent] =>
[createdAt] => 2013-12-18T21:52:59
)
[11] => Array
(
[id] => 1169354287
[parent] =>
[createdAt] => 2013-12-18T22:20:08
)
[6] => Array
(
[id] => 1171264520
[parent] => 1169354287
[createdAt] => 2013-12-20T08:58:26
)
[10] => Array
(
[id] => 1169362457
[parent] =>
[createdAt] => 2013-12-18T22:27:28
)
[9] => Array
(
[id] => 1170597579
[parent] =>
[createdAt] => 2013-12-19T20:22:40
)
[8] => Array
(
[id] => 1170700661
[parent] => 1170597579
[createdAt] => 2013-12-19T21:30:31
)
[5] => Array
(
[id] => 1171287657
[parent] => 1170597579
[createdAt] => 2013-12-20T09:29:34
)
[3] => Array
(
[id] => 1171304353
[parent] => 1171287657
[createdAt] => 2013-12-20T09:55:34
)
[2] => Array
(
[id] => 1171313704
[parent] => 1171304353
[createdAt] => 2013-12-20T10:14:46
)
[1] => Array
(
[id] => 1171360372
[parent] => 1171313704
[createdAt] => 2013-12-20T11:18:46
)
[0] => Array
(
[id] => 1171409310
[parent] => 1171287657
[createdAt] => 2013-12-20T12:42:19
)
[7] => Array
(
[id] => 1171014482
[parent] =>
[createdAt] => 2013-12-20T02:51:24
)
[4] => Array
(
[id] => 1171303539
[parent] => 1171014482
[createdAt] => 2013-12-20T09:53:54
)
)
答案 0 :(得分：3)
我现在正在建立一个评论系统。只是订购这样的评论并不能真正让你在评论（亲子关系）之间建立牢固的关系。
在这种情况下，我会执行以下操作：
$comments = array();
foreach ($results as $result) {
if ($result["parent"]) {
$result["children"] = array();
$comments[$result["id"]] = $result;
}
}
// Have yet to do this a better way. Second loop is there for a reason.
foreach ($results as $result) {
if ($result["parent"])
$comments[$result["parent"]]["children"] = $result;
}
var_dump($comments);
// you can now sort on createdAt using uasort(array $array, callable $func)
uasort($comments, function ($a, $b) {
if ($a["createdAt"] == $b["createdAt"])
return 0;
return ($a["createdAt"] > $b["createdAt"]) ? 1 : -1;
// reverse this to change sort order
});
答案 1 :(得分：2)
uasort($array, function($a, $b) {
// sort by date first
if (@$a["createdAt"] == @$b["createdAt"]){
return 0;
}
return (@$a["createdAt"] > @$b["createdAt"]) ? 1 : -1;
});
$array_asc = array();
foreach($array as $key => $val){
// create an array with ids as keys and children
// with the assumption that parents are created earlier.
// store the original key
$array_asc[$val['id']] = array_merge($val, array('org_key' => $key));
if ($val['parent']){
$array_asc[$val['parent']]['children'][] = $val['id'];
}
}
$array_out = array();
// get a flat array again
foreach($array_asc as $val){
if ($val['parent']){
continue;
}
add_to_output($array_out, $val, $array_asc);
}
function add_to_output(&$array_out, $val, $array_asc){
$array_out[$val['org_key']] = $val;
if (sizeof($val['children'])){
foreach($val['children'] as $id){
add_to_output($array_out, $array_asc[$id], $array_asc);
}
}
unset($array_out[$val['org_key']]['children'], $array_out[$val['org_key']]['org_key']);
}
未经测试。
答案 2 :(得分：1)
您可以使用php array_multisort
你可能想要像这样构建你的数组
<?php
function array_orderby()
{
$args = func_get_args();
$data = array_shift($args);
foreach ($args as $n => $field) {
if (is_string($field)) {
$tmp = array();
foreach ($data as $key => $row)
$tmp[$key] = $row[$field];
$args[$n] = $tmp;
}
}
$args[] = &$data;
call_user_func_array('array_multisort', $args);
return array_pop($args);
}
?>
<?php
$data[] = array('createdAt' => 67, 'parent' => 2);
$data[] = array('createdAt' => 86, 'parent' => 1);
$data[] = array('createdAt' => 85, 'parent' => 6);
$data[] = array('createdAt' => 98, 'parent' => 2);
$data[] = array('createdAt' => 86, 'parent' => 6);
$data[] = array('createdAt' => 67, 'parent' => 7);
// Pass the array, followed by the column names and sort flags
$sorted = array_orderby($name_of_array, 'createdAt', SORT_DESC, 'parent', SORT_ASC);
?>