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@NogDogSep 29.2014 — #Sounds like you're trying to do something like this, which is pretty clunky and not scalable:
Output:
But I think you'd be better off in the long run with a structure that used the "id" as the array key (essentially a hash instead of an array), so that the structure was more like the following, more succinct and more accurately reflecting the structure:
Create or rearrange the current array based on it’s value in php
Hi Guys,
I am really stuck with something and can’t get a way out.I am having a problem in creating a new array based on existing array.I have the following array and I want to match elements ‘id’ with ‘parent’ element. If the value is same then I want to create another array where the child elements will be under parent element.
[CODE]Array
(
[0] => Array
(
[id] => 66
[parent] => 26
)
[1] => Array
(
[id] => 47
[parent] => 26
)
[2] => Array
(
[id] => 48
[parent] => 66
)
I want it to be
[CODE]Array
(
[0] => Array
(
[id] => 66
[parent] => 26
)
[0] => Array
(
[id] => 48
[parent] => 66
)
[1] => Array
(
[id] => 47
[parent] => 26
)[/CODE]
I am stuck with the following code.I have got the values but I don’t know how to match with another element in a array.
[code=php] foreach($firstlevel_results as $k => $v)
{
echo $v[‘id’].”==”.$v[‘parent’].”==”.$v[‘grandparent’].”<br>”;
}
Please suggest if there is any possible way.Thanks in advance. ?
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@NogDogSep 29.2014 — #Sounds like you're trying to do something like this, which is pretty clunky and not scalable:[code=php]
<?php
$data = array(
array(
'id' => 66,
'parent' => 26
),
array(
'id' => 47,
'parent' => 26
),
array(
'id' => 48,
'parent' => 66
)
);
$byID = array();
foreach($data as $arr) {
$byID[$arr['id']] = $arr['parent'];
}
$result = array();
$children = array();
foreach($byID as $id => $parent) {
if(!isset($byID[$parent])) {
$result[] = array(
'id' => $id,
'parent' => $parent
);
}
else {
$children[$id] = $parent;
}
}
foreach($children as $id => $parent) {
foreach($result as &$arr) {
if($arr['id'] == $parent) {
$arr['children'][] = array(
'id' => $id,
'parent' => $parent
);
}
}
}
echo "<pre>".print_r($result, 1)."</pre>";
[/code]Output:
<i>
</i>Array
(
[0] => Array
(
[id] => 66
[parent] => 26
[children] => Array
(
[0] => Array
(
[id] => 48
[parent] => 66
)
<i> </i> )
<i> </i> )
<i> </i>[1] => Array
<i> </i> (
<i> </i> [id] => 47
<i> </i> [parent] => 26
<i> </i> )
)
But I think you'd be better off in the long run with a structure that used the "id" as the array key (essentially a hash instead of an array), so that the structure was more like the following, more succinct and more accurately reflecting the structure:
[code=php]
$data = array(
26 => array(
66 => array(
48 => array()
),
47 => array()
)
);
[/code]