PHP Create breadcrumb list of every value in nested array

Question

I have an array that looks like the following:

[
    'applicant' => [
        'user' => [
            'username' => true,
            'password' => true,
            'data' => [
                'value' => true,
                'anotherValue' => true
            ]
        ]
    ]
]

What I want to be able to do is convert that array into an array that looks like:

[
    'applicant.user.username',
    'applicant.user.password',
    'applicant.user.data.value',
    'applicant.user.data.anotherValue'
]

Basically, I need to somehow loop through the nested array and every time a leaf node is reached, save the entire path to that node as a dot separated string.

Only keys with true as a value are leaf nodes, every other node will always be an array. How would I go about accomplishing this?

edit

This is what I have tried so far, but doesnt give the intended results:

    $tree = $this->getTree(); // Returns the above nested array
    $crumbs = [];

    $recurse = function ($tree, &$currentTree = []) use (&$recurse, &$crumbs)
    {
        foreach ($tree as $branch => $value)
        {
            if (is_array($value))
            {
                $currentTree[] = $branch;
                $recurse($value, $currentTree);
            }
            else
            {
                $crumbs[] = implode('.', $currentTree);
            }
        }
    };

    $recurse($tree);

And what you have tried so far. Post your attempts too..

Narendrasingh Sisodia
– Narendrasingh Sisodia

2015-09-16 09:29:59 +00:00
Commented Sep 16, 2015 at 9:29 — Narendrasingh Sisodia
– Narendrasingh Sisodia, Commented Sep 16, 2015 at 9:29
I have posted my attempt above

Ozzy
– Ozzy

2015-09-16 09:33:21 +00:00
Commented Sep 16, 2015 at 9:33 — Ozzy
– Ozzy, Commented Sep 16, 2015 at 9:33

Phylogenesis · Accepted Answer · 2015-09-16 09:50:47Z

2

This function does what you want:

function flattenArray($arr) {
    $output = [];

    foreach ($arr as $key => $value) {
        if (is_array($value)) {
            foreach(flattenArray($value) as $flattenKey => $flattenValue) {
                $output["${key}.${flattenKey}"] = $flattenValue;
            }
        } else {
            $output[$key] = $value;
        }
    }

    return $output;
}

You can see it running here.

answered Sep 16, 2015 at 9:50

Phylogenesis

7,90024 silver badges27 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

PHP Create breadcrumb list of every value in nested array

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related