how to pass multiple values to an array PHP

Question

<select id="framework" name="framework" placeholder="Users" multiple class="form-control" style="width:width: 400px; overflow-y: all; max-height: 200px;">

<option value="[email protected]"> one</option>

<option value="[email protected]"> two</option>

</select>

<?php

$students = $_POST["framework"];

 

/*keep in mind $students takes multiple values like one,two */

 

Now i want to show these value in

 

$emails = array(',' , $students);

 

Is it correct?

 

For example

 

$students have these values: one, two, three, four

 

It should be go in array like

 

$emails = array(',' , 'one', 'two', 'three', 'four') ;

 

Please guide me, how i can do this please!