<?php
$comments = [
1 => ['content' => "The first comment", 'parent' => 0],
2 => ['content' => "The second comment", 'parent' => 0],
3 => ['content' => "Reply of first comment", 'parent' => 1],
4 => ['content' => "Another reply of first comemnt", 'parent' => 1],
5 => ['content' => "Reply of a reply of the first comment", 'parent' => 4]
];
foreach($comments as $id => &$value)
{
# check if there is a parent
if ($parentId = $value['parent'])
{
$comments[$parentId]['comments'][$id] =& $value; # add child to parent
unset($comments[$id]); # remove reference from topmost level
}
}
unset($value); # remove iterator reference
print_r($comments); # your tree
// foreach($comments as $id => &$c) {
// if (isset($comments[$c['parent']])) {
// $comments[$c['parent']]['comments'][$id] =& $c;
// unset($comments[$id]);
// }
// }
// var_dump($comments);
- Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- Warning: Undefined array key "parent" in /in/q2ZeV on line 15
Array
(
[1] => Array
(
[content] => The first comment
[parent] => 0
[comments] => Array
(
[3] => Array
(
[content] => Reply of first comment
[parent] => 1
)
[4] => Array
(
[content] => Another reply of first comemnt
[parent] => 1
)
)
)
[2] => Array
(
[content] => The second comment
[parent] => 0
)
[4] => Array
(
[comments] => Array
(
[5] => Array
(
[content] => Reply of a reply of the first comment
[parent] => 4
)
)
)
)
- Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
- Notice: Undefined index: parent in /in/q2ZeV on line 15
Array
(
[1] => Array
(
[content] => The first comment
[parent] => 0
[comments] => Array
(
[3] => Array
(
[content] => Reply of first comment
[parent] => 1
)
[4] => Array
(
[content] => Another reply of first comemnt
[parent] => 1
)
)
)
[2] => Array
(
[content] => The second comment
[parent] => 0
)
[4] => Array
(
[comments] => Array
(
[5] => Array
(
[content] => Reply of a reply of the first comment
[parent] => 4
)
)
)
)
- Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.3.0 - 7.3.1, 7.3.32 - 7.3.33
- Array
(
[1] => Array
(
[content] => The first comment
[parent] => 0
[comments] => Array
(
[3] => Array
(
[content] => Reply of first comment
[parent] => 1
)
[4] => Array
(
[content] => Another reply of first comemnt
[parent] => 1
)
)
)
[2] => Array
(
[content] => The second comment
[parent] => 0
)
[4] => Array
(
[comments] => Array
(
[5] => Array
(
[content] => Reply of a reply of the first comment
[parent] => 4
)
)
)
)
preferences:
207.52 ms | 404 KiB | 244 Q