Decodes a string of key-value pairs data and returns a flat list of keys and values.

When the function is called with:

wasKeyValueDecode("position=<1,1,0>&toggle=on");

it will return the list of strings:

[ "position", "<1,1,0>", "toggle", "on" ];

Consider using string to vector for converting the <1,1,0> string to a vector.

///////////////////////////////////////////////////////////////////////////
//    Copyright (C) 2013 Wizardry and Steamworks - License: CC BY 2.0    //
///////////////////////////////////////////////////////////////////////////
list wasKeyValueDecode(string data) {
    return llParseString2List(data, ["&", "="], []);
}

///////////////////////////////////////////////////////////////////////////
//    Copyright (C) 2014 Wizardry and Steamworks - License: CC BY 2.0    //
///////////////////////////////////////////////////////////////////////////
/// <summary>
///     Decodes key-value pair data to a dictionary.
/// </summary>
/// <param name="data">the key-value pair data</param>
/// <returns>a dictionary containing the keys and values</returns>
private static Dictionary<string, string> wasKeyValueDecode(string data)
{
    Dictionary<string, string> output = new Dictionary<string, string>();
    foreach (string tuples in data.Split('&'))
    {
        string[] tuple = tuples.Split('=');
        if (!tuple.Length.Equals(2))
        {
            continue;
        }
        if (output.ContainsKey(tuple[0]))
        {
            continue;
        }
        output.Add(tuple[0], tuple[1]);
    }
    return output;
}

###########################################################################
##  Copyright (C) Wizardry and Steamworks 2014 - License: CC BY 2.0      ##
###########################################################################
function wasKeyValueDecode($data) {
    preg_match_all("/(.+?)=(.+?)(&|$)/", $data, $match);
    return array_combine($match[1], $match[2]);
}