Bind multiple parameters into mysqli query

Right now I need to use the following structure to cope with binding multiple parameters into a mysqli query:

if ($words_total == 1)
{
    $statement -> bind_param("s", $words[0]);
}
else if ($words_total == 2)
{
    $statement -> bind_param("ss", $words[0], $words[1]);
}
else if ($words_total == 3)
{
    $statement -> bind_param("sss", $words[0], $words[1], $words[2]);
}

//and so on....

I work out the number of question marks using the code below and insert it into my query:

$marks = "";
for($i = 1; $i<=$words_total; $i++) {
    if ($i == $words_total)
    {
        $marks .= "?";
    }
    else
    {
        $marks .= "?,";
    }
}

My question is surely there must be a way of handling as many inputs into the query as I need dynamically. Hardcoding the bind_param() seems like a really bad way of handling this.

I am using php version 5.4.10