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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. ------ 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; } } } }