<script type="text/javascript">
encodeURIComponent('簡訊內容');
</script>

public string UrlEncode(string str)
{
    StringBuilder sb = new StringBuilder();
    byte[] byStr = System.Text.Encoding.UTF8.GetBytes(str);
    for (int i = 0; i < byStr.Length; i++)
    {
        sb.Append(@"%" + Convert.ToString(byStr[i], 16));
    }
    return (sb.ToString().ToLower().Replace("%20", "+").Replace("%2d", "-").Replace("%5f", "_"));
}

function urlencodestr($string)
{
    $str = strtolower(urlencode(mb_convert_encoding($string, 'utf-8', 'big5')));
    $str = str_replace("%20","+",$str);
    $str = str_replace("%2d","-",$str);
    $str = str_replace("%5f","_",$str);
    return $str;
}

public String urlEncode(String str)
{
    StringBuffer stringBuffer=new StringBuffer();
    byte[] byStr=str.getBytes();
    for(int i=0;i < byStr.length;i++)
    {
        stringBuffer.append("%"+byStr[i]);
    }
    return stringBuffer.toString().toLowerCase().replace("%20", "+").replace("%2d", "-").replace("%5f", "_");
}