Something

<?php
	$submit = isset($_POST['command']);

	if($submit) { }
	
        $myList =  array(1,2,3,4,5);
 	$myM = 10;

        function mult($list, $m) {
                $list = array_values($list);
                for ($i = 0; $i < count($list); ++$i) {
                         $list[$i] *= $m;
                }
                return $list;
        }
 
        $myList = mult($myList, $myM);
    
        echo implode(",",$myList);

	echo "<form action=\"/test/hahahoho.php\" method=\"get\">\r\n";
	echo "Lower Limit:  <input type=\"text\" name=\"hehe\" value=\"\" maxlength=\"40\" />\r\n";
	echo "<input type=\"submit\" name=\"command\" value=\"go\"/>\r\n";
        echo "</form>";

?>