Recursively loop through multidimensional to create flat array

Question

I have a multidimensional array that looks like this:

$trees = array(
    array(
        \'name\' => \'Parent\',
        \'__children\' => array(
                  


        

Answer 1

code

'Parent',
        '__children' => array(
            array(
                'name' => 'Child'
            ),
            array(
                'name' => 'Second Child'
            )
        )
    )
);

echo"
";
print_r($input_array);
echo"
";


function flatten($arr){
    global $output_array;
    if(is_array($arr)){
        foreach($arr as $key=>$value){
            if($key=="name" && !is_array($value)){
                $output_array[] = array($key=>$value);
            }
            elseif(is_array($value)){
                flatten($value);
            }
        }
    }
}

flatten($input_array);

echo"
";
print_r($output_array);
echo"
";

Output

//Input array
Array
(
    [0] => Array
        (
            [name] => Parent
            [__children] => Array
                (
                    [0] => Array
                        (
                            [name] => Child
                        )

                    [1] => Array
                        (
                            [name] => Second Child
                        )

                )

        )

)

//Output Array
Array
(
    [0] => Array
        (
            [name] => Parent
        )

    [1] => Array
        (
            [name] => Child
        )

    [2] => Array
        (
            [name] => Second Child
        )

)