<table>

<tr><td><label>username:</label></td><td><input type="text" name="username"></td></tr>

<tr><td><label>password:</label></td><td><input type="text" name="password"></td></tr>

<tr><td><label>email:</label></td><td><input type="text" name="email"></td></tr>

<tr><td><label>Image:</label></td><td><input type="file" name="image"></td></tr>

<tr><td colspan="2" align="center"><input type="submit" name="submit" value="Submit" />

</table>

function api_sub()
{
    $this->layout = false;
    $this->data['Document'] = $this->params['form'];
    pr($this->data); die();
}

Array
(
    [Document] => Array
        (
            [username] => mack
            [password] => meack
            [email] => mack@gmail.com
            [submit] => Submit
            [image] => Array
                (
                    [name] => 01manta.jpg
                    [type] => image/jpeg
                    [tmp_name] => C:wamptmpphpF586.tmp
                    [error] => 0
                    [size] => 636306
                )
        )
)

//$this->layout = false;
    $this->request->data['Document']= $this->request->data;
    pr($this->request->data); die();

}

Array
(
    [username] => mack
    [password] => meack
    [email] => mack@gmail.com
    [submit] => Submit
    [User] => Array
        (
            [username] => mack
            [password] => meack
            [email] => mack@gmail.com
            [submit] => Submit
        )

)