Create variable length array from string

Question

The string

$string = \'a.b.c.d\';

should create an array like

array(\'a\' => array(\'b\' => array( ....

I managed

Answer 1

This should work:

function create_array(&$arr,$string,$data){
    $a=explode('.',$string);
    $last=count($a)-1;
    $p=&$arr;

    foreach($a as $k=>$key){
        if ($k==$last) {
            $p[$key]=$data; 
        } else if (is_array($p)){
            $p[$key]=array();
        }
        $p=&$p[$key];
    }
}

Answer 2

It's still pretty unclear, but if you only want what you have asked for:

function convertToArray($string)
{
    $pos = strpos($string, '.');
    $key = substr($string, 0, $pos);

    $result = array($key => array());

    if ($pos === false) {
        return array($string=>array());
    } else {
        $result[$key] = convertToArray(substr($string, ($pos+1)));

        return $result;
    }
}

var_dump(convertToArray('a.b.c.d'));

Will ouput:

array(1) {
  ["a"]=>
  array(1) {
    ["b"]=>
    array(1) {
      ["c"]=>
      array(1) {
        ["d"]=>
        array(0) {
        }
      }
    }
  }
}