Multidimensional Arrays Nested to Unlimited Depth

Question

I have a multidimensional array nested to an unknown/unlimited depth. I\'d like to be able to loop through every element. I don\'t want to use, foreach(){foreach(){for

Answer 1

Have you thought about using array_walk_recursive for this?

Another (slower) approach would be to flatten the array first before performing a search, ie:

$myarray = array('a','b',array(array(array('x'),'y','z')),array(array('p')));

function array_flatten($array,$return)
{
    for($x = 0; $x <= count($array); $x++)
    {
        if(is_array($array[$x]))
        {
            $return = array_flatten($array[$x],$return);
        }
        else
        {
            if($array[$x])
            {
                $return[] = $array[$x];
            }
        }
    }
    return $return;
}

$res = array_flatten($myarray,array());

Or, for a recursive search, see here for an example:

function arrayRecursiveSearch($needle, $haystack, $path=""){
  if(!is_array($haystack)){
    die("second argument is not array");
  }

  global $matches;

  foreach($haystack as $key=>$value)
  {
    if(preg_match("/$needle/i", $key)){
      $matches[] = array($path . "$key/", "KEY: $key");
    }

    if(is_array($value)){
      $path .= "$key/";
      arrayRecursiveSearch($needle, $value, $path);
      unset($path);
    }else{
      if(preg_match("/$needle/i", $value)){
        $matches[] = array($path . "$key/", "VALUE: $value");
      }
    }
  }

  return $matches;
}

$arr = array("Asia"=>array('rambutan','duku'),
              "Australia"=>array('pear','kiwi'),
              "Arab"=>array('kurma'));

print_r(arrayRecursiveSearch("ra",$arr));