Action for every key and value pair in multidimensional associative array of variable dimensions

Hi there,

I've posted this at stackoverflow but did not receive any replies so far so I'd like to try here as well.

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I have an array of variable dimensions and namings. Sometimes associative, sometimes partially. Sometimes just a single array, sometimes multiple dimensions. An example array is this:

array(4) {
["name"]=>
string(9) "Some Name"
["user"]=>
array(2) {
["id"]=>
int(1)
["msgs"]=>
array(3) {
[0]=>
string(16) "My first message"
[1]=>
string(17) "My second message"
["folder"]=>
array(2) {
["first"]=>
string(13) "Some folder.."
[1]=>
string(17) "some other stuf.."
}
}
}
[0]=>
string(17) "More random stuff"
["foo"]=>
array(2) {
[0]=>
string(10) "more stuff"
["bar"]=>
string(7) "The end"
}
}

I would like to have a function that goes through every key and value pair and performs a function, without altering the structure of the array. In this case, I want to apply htmlspecialchars() with ENT_QUOTES on every key and value pair in the array while keeping the array itself intact structure wise.

I have tried with array_walk_recursive and array_map, neither seem to do the trick.

I'm pretty new to PHP but I tried the following function by messing about with how I think it should be done but it's obviously not working

  private function CreateErrorArray($array, $knownKeys=NULL) {
    if (is_array($array)) {
      foreach ($array as $key => $value) {
        if (is_array($value)) {
          if (is_null($knownKeys)) {  
            $keys = array($key);
            $this->response['ERRORARRAY'][$key] = $this->CreateErrorArray($this->RequestClass->error[$key], $keys);
          } else {
            $keys = array_push($knownKeys, $key);
            $this->response['ERRORARRAY'][$key] = $this->CreateErrorArray($this->RequestClass->error[$knownKeys][$key], $keys);
          }
        } else {
          $this->response['ERRORARRAY'][$key] = $value;
        }
      }
    }
}