如何将名称放入选项并发布?

I was wondering how I get the information VIA post from a option tag, here is my code so far and I am not sure what to do thanks.

<html>
<body>
    <form method = "post" action="<?php echo $_SERVER['PHP_SELF'];?>">
        <select>
            <option name = "rock">Rock</option>
            <option name = "paper">Paper</option>
            <option name = "scissors">Scissors</option>
        </select>
        <button type = "submit">Submit</button>
    </form>
    <?php
    $rock = $_POST["rock"];
    $paper = $_POST["paper"];
    $scissors = $_POST["scissors"];





    ?>
</body>
</html>

You want to name the select, and have values for each option like this:

<select name="choice">
    <option value= "rock">Rock</option>
    <option value= "paper">Paper</option>
    <option value= "scissors">Scissors</option>
</select>

And:

$pick = $_POST['choice']

Also note that leaving the action field blank will automatically post back to the same page

<form method = "post" action="">