PHP Extract Array with greater than sign? - php

Question

my array is looking like
Array
(
[0] => Array
(
[id] => 1
[parent_id] => 0
[title] => Mobiles & Tablets
[childs] => Array
(
[0] => Array
(
[id] => 10
[parent_id] => 1
[title] => Mobile Phone
)
)
)
[1] => Array
(
[id] => 5
[parent_id] => 0
[title] => Mobile Phones
[childs] => Array
(
[0] => Array
(
[id] => 2
[parent_id] => 5
[title] => Moto G
[childs] => Array
(
[0] => Array
(
[id] => 3
[parent_id] => 2
[title] => Android
)
)
)
[1] => Array
(
[id] => 4
[parent_id] => 5
[title] => Iphone
)
)
)
[2] => Array
(
[id] => 6
[parent_id] => 0
[title] => test
)
[3] => Array
(
[id] => 7
[parent_id] => 0
[title] => Men's Fashion
[childs] => Array
(
[0] => Array
(
[id] => 12
[parent_id] => 7
[title] => Clothing
[childs] => Array
(
[0] => Array
(
[id] => 8
[parent_id] => 12
[title] => Jeans
)
)
)
)
)
[4] => Array
(
[id] => 9
[parent_id] => 0
[title] => test
)
)
i write php code for extract Array.
public $string = '';
public $result = array();
public function getCategoryListsTree( array $items ){
$this->createCategoryExtractNode($items);
echo '<pre>';
print_r($this->result);
exit;
}
public function createCategoryExtractNode(array $items)
{
foreach ($items as $key => $value) {
$this->string .= $value['title'].' > ';
if(isset($value['childs'])){
$this->string .= $this->createCategoryExtractNode($value['childs']);
}else{
$this->result[$value['id']] = trim($this->string,' > ');
$this->string = '';
}
}
}
The Output is
Array
(
[10] => Mobiles & Tablets > Mobile Phone
[3] => Mobile Phones > Moto G > Android
[4] => Iphone
[6] => test
[8] => Men's Fashion > Clothing > Jeans
[9] => test
)
I want output like
Array
(
[10] => Mobiles & Tablets > Mobile Phone
[3] => Mobile Phones > Moto G > Android
[4] => Mobile Phones > Iphone
[6] => test
[8] => Men's Fashion > Clothing > Jeans
[9] => test
)
please help
Thanks

Answer 1

Globals are evil, even if they are wrapped in a fancy OO style. $string is a local context for each createCategoryExtractNode invocation. This does the job:
public $result = array();
public function getCategoryListsTree( array $items ){
$this->createCategoryExtractNode($items);
echo '<pre>';
print_r($this->result);
exit;
}
public function createCategoryExtractNode(array $items, $carrier='')
{
foreach ($items as $key => $value) {
$string = $carrier . $value['title'].' > ';
if(isset($value['childs'])){
$this->createCategoryExtractNode($value['childs'], $string);
}else{
$this->result[$value['id']] = trim($string,' > ');
}
}
}

Answer 2

You need to keep current path in each moment, so lets add a respective property instead of string in your class definition:
public $path = [];
We push an element to path array on entering and pop array in the end. So path property array keeps current path to item. Path items are glued with ' > ' when reaching leaf node:
public function createCategoryExtractNode(array $items)
{
foreach ($items as $key => $value) {
array_push($this->path, $value['title']);
if (isset($value['childs'])) {
$this->string .= $this->createCategoryExtractNode($value['childs']);
} else {
$this->result[$value['id']] = implode(' > ', $this->path);
}
array_pop($this->path);
}
}

Answer 3

This also gets the job done:
public function createCategoryExtractNode(array $items, $breadcrumbs = array(), $level = 0)
{
foreach ($items as $key => $value) {
$breadcrumbs[$level] = $value['title'].' > ';
if(isset($value['childs'])){
$this->createCategoryExtractNode($value['childs'], $breadcrumbs, $level+1);
}else{
$this->string = implode('',$breadcrumbs);
$this->result[$value['id']] = trim($this->string,' > ');
$this->string = '';
}
}
}