Build recursive array with multi level elements

Build recursive array with multi level elements - php

Related

Convert php array to select box options

You can create array by this way:
$array = array(
'category_1' => 'value',
'category_2' => array(
'subcategory_1' => 'value',
'subcategory_2' => 'value',
),
);

Transversing a materialized view by path

I get an array as shown below using this query:
SELECT id, person_id, description, path FROM comment WHERE path <# '0001' ORDER by path
My question is how am I suppose to use the to display the output as threaded? Do I check the first four numbers and increment to see if they are in the same level or is there something that I'm failing to understand?
[0] => Array
(
[id] => 1
[person_id] => 1
[description] => a75e62536ca2687ae5817acb739e61f3
[path] => 0001
)
[1] => Array
(
[id] => 2
[person_id] => 2
[description] => 010242f78cd5d41abb16a8ba488957a1
[path] => 0001.0001.0001
)
[2] => Array
(
[id] => 3
[person_id] => 2
[description] => cdde38b2b13ee808ce5423cdf8d14bab
[path] => 0001.0001.0001.0001
)
[3] => Array
(
[id] => 4
[person_id] => 1
[description] => 6b837ce73896fbd080bd0b93837ad537
[path] => 0001.0001.0001.0002
)
[4] => Array
(
[id] => 5
[person_id] => 5
[description] => e5694a273ed95d36934cff48cd8fb12a
[path] => 0001.0001.0001.0003
)
[5] => Array
(
[id] => 6
[person_id] => 6
[description] => 15b2ad371934352c0b16c5c1585f3d7d
[path] => 0001.0002
)
[6] => Array
(
[id] => 7
[person_id] => 6
[description] => 2d1595f0c4ec527c601f404c7a272407
[path] => 0001.0002.0001
)
[7] => Array
(
[id] => 8
[person_id] => 6
[description] => 8286c3bbe511d866e4e2ef4321a429d7
[path] => 0001.0003
)
[8] => Array
(
[id] => 9
[person_id] => 8
[description] => dc455dd484220176d1d2198f84bdbc90
[path] => 0001.0003.0001
)
[9] => Array
(
[id] => 10
[person_id] => 9
[description] => b8a8f41b224f900f6f5de0e591ba13b8
[path] => 0001.0003.0002
)
[10] => Array
(
[id] => 11
[person_id] => 11
[description] => ef132c4663961ff09ca61f40eec72697
[path] => 0001.0003.0002.0001
)

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Removing an array result

[5] => Array
(
[id] => 29372
[product_id] => Array
(
[0] => stdClass Object
(
[id] => 1469
[type_id] => 1
[title] => Hearth 2 Hearth
[cover] => 21cf9d7d09d403251ba5d01ff33cd089.jpg
[coverid] => 1178
[inserted_by] => 0
[inserted_date] => 2011-02-11 13:55:23
[status_id] => 0
)
)
[variable_id] => 9
[variable_value] => 2011-02-11
[master_value] =>
[released_date] => 2011-02-11
[price] => Array
(
[0] => Array
(
[product_id] => 1469
[media_format] => VCD
[price] => 29000
[discount] => 5
)
)
[media_format] => VCD
)
[6] => Array
(
[id] => 30074
[product_id] => Array
(
[0] => stdClass Object
(
[id] => 1470
[type_id] => 1
[title] => Hearth 2 Hearth
[cover] => 149ddd4d1d5e567c1300d4831323e1c5.jpg
[coverid] => 1177
[inserted_by] => 6
[inserted_date] => 2011-02-16 15:18:58
[status_id] => 0
)
)
[variable_id] => 9
[variable_value] => 2011-02-11
[master_value] =>
[released_date] => 2011-02-11
[price] => Array
(
[0] => Array
(
[product_id] => 1470
[media_format] => DVD
[price] => 39000
[discount] => 0
)
)
[media_format] => DVD
)
I want the result by media_format = DVD so the whole array is gone, is there anyway to delete an array or remove it?

The same way you "delete" any variable:
unset($array[$index]);

PHP: Sort an array

Don't do this in PHP!
The MySQL server is specificly designed to query AND sort data, read up on the MySQL "ORDER BY" syntax. Doing this on the MySQL server will save run-time, CPU Load and Memory Consumption.

Use php's uasort() function to define your own comparison function.
But using MySQL's sorting capabilities would be more appropriate, if it's possible in your case.

You want to sort it like it is in the DB, multilayered. I don't think uasort can help with this problem because you want to attach the children to the parent.
foreach ($arr as &$val) {
$arr2[$val['id']] = &$val;
}
ksort($arr2);
foreach ($arr2 as $id => &$val) {
$parent = $val['parent'];
if ($parent == 0) {
continue;
}
$arr2[$parent]['children'][$id] = &$val;
}
function flattenArrayByChildren($arr) {
foreach ($arr as $id => $val) {
if (isset($val['children'])) {
$temp = flattenArrayByChildren($val['children']);
unset($val['children']);
$out[$id] = $val;
$out = $out + $temp;
} else {
$out[$id] = $val;
}
}
return $out;
}
$arr2 = array(1 => $arr2[1]);
$out = flattenArrayByChildren($arr2);
var_dump($out);
If you absolutely want to save the key, you can just add that to the $val in the first foreach, and retrieve it in the recursive function flattenArrayByChildren and use as key.

Problem solved - I made two simple functions. I hope other people could have use of this as well:
class data_comp
{
var $fetched_tree = array();
function tree_fetch($parent = 0)
{
$query = 'SELECT node.id, node.name, node.parent, (COUNT(parent.name) - 1) AS depth FROM test_competence AS node, test_competence AS parent WHERE node.lft BETWEEN parent.lft AND parent.rgt GROUP BY node.name ORDER BY node.name';
$result = mysql_query($query) or die(mysql_error());
$tree = array();
while($data = mysql_fetch_assoc($result))
{
$tree[$data['parent']][$data['id']] = array('name' => $data['name'], 'depth' => $data['depth']);
}
$this->tree_print($tree, $parent);
}
function tree_print($tree, $parent)
{
foreach($tree[$parent] as $id => $value)
{
$this->fetched_tree[] = array('id' => $id, 'name' => $value['name'], 'depth' => $value['depth']);
if(isset($tree[$id]) && is_array($tree[$id]))
{
$this->tree_print($tree, $id);
}
}
}
}
Thank you for your time. Any improvements are more than welcome.

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Build recursive array with multi level elements - php

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