PHP Example for Subscriber List

Something like..

<?php

//db connect variables
$host = "mysql server address";
$user = "mysql username";
$pw = "mysql password";
$db = "mysql database name";

//connect to db
$con = mysql_connect($host,$user,$pw);
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }
mysql_select_db($db, $con);

//get variables from script
$uuid = $_REQUEST['UUID'];
$cm = $_REQUEST['command'];

//process variables
switch($cm) {
  case "add":
    if(!mysql_query("SELECT * FROM tbl_News WHERE uuid = '$uuid'")) {
      mysql_query("INSERT INTO tbl_News VALUES ('$uuid')");
    }

    //return to script
    echo $cm." complete.";
    break;

  case "rem":
    mysql_query("DELETE FROM tbl_News WHERE uuid='$uuid'");

    //return to script
    echo $cm." complete.";
    break;

  case "tot":
    if($uuid = "") { //place your key between the quotes here
      $q = mysql_query("SELECT * FrOM tbl_News");
      $tot = mysql_num_rows($q);  //get the total entries in the table
    }
      //return to script
      echo $cm."|".$tot;
      break;

  case "dist":
    $dist = mysql_query("SELECT * FROM tbl_News");
    while($row = mysql_fetch_array($dist))
    {
      echo $row['uuid'];
      sleep(20);
    }
    break;

  }
mysql_close($con);

?>

This isn't tested or anything but it should be pretty close, to give an idea what you're function script will be.