Php multidimensional array to simple array [duplicate]

Answer 1

You can implement recursive processing with a stack:

$separator = '-';
$flat = array();

while ($array);
{
    $key   = key($array);
    $value = array_shift($array);

    if (is_array($value))
    {
        foreach($value as $subKey => $node)
        {
            $array[$key.$separator.$subKey] = $node;
        }
    }
    else
    {
        $flat[$key] = $value;
    }
}

Output (Demo):

Array
(
    [one] => one_value
    [two-four] => four_value
    [two-five] => five_value
    [three-six-seven] => seven_value
)