CODEWITHSUNDEEP
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Wondering Coder
Wondering Coder

Reputation: 1702

Adding prefix '>' from my array tree

Array
(
[0] => Array
    (
        [id] => 39
        [parent_id] => 0
        [sku] => Parent
    )

[1] => Array
    (
        [id] => 40
        [parent_id] => 39
        [sku] => Child of parent id 39
    )

[2] => Array
    (
        [id] => 41
        [parent_id] => 40
        [sku] => Child of child id 40
    )

[3] => Array
    (
        [id] => 42
        [parent_id] => 40
        [sku] => Another child of child id 40
    )

[4] => Array
    (
        [id] => 43
        [parent_id] => 39
        [sku] => Another child of parent id 39
    )
etc..
)

I have here an associative arrays which basically is a parent - child relationship. There's been so many sample in the web on how to build a tree that help me a lot. But right now I just want to format my array to something like this: 

> Parent                               --> first prefix ">"
    >> Child of parent id 39           --> added two ">" prefixes
        >>> Child of child id 40       --> added three ">" prefixes
        >>> Another child of child id 40
    >> Another child of parent id 39
and so on..

Update: This is how I build my tree for now:

function pdf_content($data, $parentId = 0)
{
    $str = '';

    foreach ($data as $row) {
        if ($row['parent_id'] == $parentId) {
            $str .= '<li>';
            $str .= $row['sku'];
            $str .= pdf_content($data, $row['id']);
            $str .= '</li>';
        }
    }

    if ($str) {
        $str = "<ol class='dashed'>" . $str . '</ol>';
    }
    return $str;
}
// this is using the ol list style.

So first the children will have to get its parent and append the prefix ">".I already have a code to build a tree but formatting it to something like this got me stuck on a tree.

Upvotes: 2

Views: 135

Answers (2)

Dwijen
Dwijen

Reputation: 590

I think this should do it.

function pdf_content($items, $parentId = 0, $prefix = '>')
{
    $str = '';
    foreach ($items as $item) 
    {
       if ($item['parent_id'] == $parentId) {
           $str .= '<li>';
           $str .= $prefix.$item['sku'];
           $str .= pdf_content($items, $item['id'], $prefix.'>');
           $str .= '</li>';
       }
    }
    if ($str) {
        $str = "<ol class='dashed'>" . $str . '</ol>';
    }
    return $str;
}

$string = pdf_content($array);

This is what I get as the Output - 

>Parent
    >>Parent 39
        >>>Parent 40
        >>>Parent 40
    >>Parent 39

Upvotes: 1

Maninderpreet Singh
Maninderpreet Singh

Reputation: 2587

To adding Prefix use recursive function with pass parameter $prefix = '>' if child found then concatinate $prefix .= '>' and pass in your Function if child not found then overwrite to $prefix = '>' only

Upvotes: 1

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