How do I add an additional child array recursively within last array in PHP

Question

I am attempting to add another child array to the last child array.

Here is a sample of my array,

This is the array I wish to add to every last element,

For example, I need to add the following to [CK][children][Fiat][children] (and every last children's children) - this array will be static, every last child will use the same array.

[BOF] => Array
    (
        [name] => Furniture
    )

[CHA] => Array
    (
        [name] => Chassis
    )

So ... ][CK][children][Fiat] would become the following,

                                            [CK] => Array
                                                (
                                                    [name] => CK
                                                    [children] => Array
                                                        (
                                                            [Fiat] => Array
                                                                (
                                                                    [name] => Fiat
                                                                        [children] => Array
                                                                            (
                                                                                [BOF] => Array
                                                                                    (
                                                                                        [name] => Furniture
                                                                                    )

                                                                                [CHA] => Array
                                                                                    (
                                                                                        [name] => Chassis
                                                                                    )
                                                                            )
                                                                )

                                                        )

                                                )

Please note, Not every last child is the same indentation level, it could be 10 more children indentations. It must use the last array within the array of each array.

Apologies if it's hard to understand, I'm struggling to word exactly the way I need it to work.

Thank you for your time and effort.

can u modify your question? create a valid PHP array not the var_dump() result — xkeshav
– xkeshav, Commented Aug 30, 2012 at 8:34
@diEcho - it's very complex code which creates that array, I was sort of looking for a function of which walks through the array I give to it and does the job. I attempted to use array_walk_recursive() but I couldn't figure it out. — verheesj
– verheesj, Commented Aug 30, 2012 at 8:38

TheHe · Accepted Answer · 2012-08-30 10:30:24Z

check out this solution (quick'n'dirty):

function injectArray(array $target, array $inject, $depth = 0){
    $hasChildrenKey = array_key_exists('children', $target);
    $hasChildren = $hasChildrenKey && !empty($target['children']);

    if($depth % 2 == 0){
        foreach($target as $k => $v)
            if(is_array($v))
                $target[$k] = injectArray($v, $inject, $depth+1);
    }
    elseif(!$hasChildren){
        if(!$hasChildrenKey)    
            $target['children'] = array();
        $target['children'] = array_merge_recursive($target['children'], $inject);
    }
    else if($hasChildrenKey){
        $target['children'] = injectArray($target['children'], $inject, $depth+1);
    }
    return $target;
};

$testArray = array(
    'Auto-Trail' => array('name' => 'asdf', 
        'children' => array(
            '2001' => array('name' => '2001',
                'children' => array(
                    'Tracker' => array('name' => 'Tracker',
                        'children' =>   array(
                            'CK' => array('name' => 'CK',
                                'children' => array(
                                    'Fiat' => array('name' => 'Fiat')
                                )
                            )
                        )                               
                    )
                )
            )
        )
    )
);

$testInjectArray = array('BOF' => array('name' => 'Furniture'), 'CHA' => array('name' => 'Chassis'));

$result = injectArray($testArray, $testInjectArray);
print_r($result);

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