订购PHP数组 [英] Ordering a PHP array

问题描述

我有一个PHP阵列（评论），有以不同方式订购。

数组内容的顺序应该是这样的...

 父
 儿童
  儿童
   儿童
亲
 儿童
  儿童
等等
 

家长的意见有父= 0。
孩子的意见有其父母的ID（例如，父​​= 1）。
小孩评论的深度/金额不详。

当我有例如这种阵列如何可以得到该顺序数组？

 阵列
（
    [0] =＆GT;排列
        （
            [COMMENT_ID] =＆GT; 1
            [家长] =＆GT; 0
        ）    [1] =＆GT;排列
        （
            [COMMENT_ID] =＆GT; 2
            [家长] =＆GT; 0
        ）    [2] =＆GT;排列
        （
            [COMMENT_ID] =＆GT; 3
            [家长] =＆GT; 1
        ）    [3] =＆GT;排列
        （
            [COMMENT_ID] =＆GT; 4
            [家长] =＆GT; 3
        ））
 

解决方案

从我<借用的href=\"http://stackoverflow.com/questions/3827340/convert-2d-array-into-3d-with-php/3827593#3827593\">answer这里。还有很多类似的问题，你可以查一下。

是这样的：

 ＆LT; PHP
$ p值=阵列（0 =＆GT;阵列（））;
的foreach（如$ N $节点）
{
  $ PID = $ N ['父'];
  的$ id = $ N ['COMMENT_ID'];  如果（！使用isset（$ P [$ PID））
    $ P [$ PID =阵列（'孩子'=＆GT;阵（））;  如果（使用isset（$ P [$ ID]））
    $孩子=安培; $ P [$ ID] ['孩子'];
  其他
    $孩子=阵列（）;  $ P [$ ID] = $ N;
  $ P [$ ID] ['孩子'] =＆放大器; $子女;
  未设置（$ P [$ ID] ['父']）;
  未设置（$子女）;  $ P [$ PID] ['孩子'] [] =＆放大器; $ P [$ ID];
}
$节点= $ P [0] ['孩子'];
未设置（$ P）;
？＆GT;
 

I have an php array (with comments) that has to be ordered differently.

The order of the array content should be like this...

parent
 child
  child
   child
parent
 child
  child
etc.

The parent comments have "parent = 0". The child comments have the id of their parent (e.g. "parent = 1"). The depth/amount of child comments is unknown.

How can get an array with the mentioned order when I have for example this kind of array?

Array
(
    [0] => Array
        (
            [comment_id] => 1
            [parent] => 0
        )

    [1] => Array
        (
            [comment_id] => 2
            [parent] => 0
        )

    [2] => Array
        (
            [comment_id] => 3
            [parent] => 1
        )

    [3] => Array
        (
            [comment_id] => 4
            [parent] => 3
        )

)

解决方案

Borrowed from my answer here. There's many similar questions you can check out.

Something like:

<?php
$p = array(0 => array());
foreach($nodes as $n)
{
  $pid = $n['parent'];
  $id = $n['comment_id'];

  if (!isset($p[$pid]))
    $p[$pid] = array('child' => array());

  if (isset($p[$id]))
    $child = &$p[$id]['child'];
  else
    $child = array();

  $p[$id] = $n;
  $p[$id]['child'] = &$child;
  unset($p[$id]['parent']);
  unset($child);

  $p[$pid]['child'][] = &$p[$id];    
}
$nodes = $p['0']['child'];
unset($p);
?>

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