PHP - A Hand If You Please

How do I re write my code so it's 

   

 $itemAnnual0 = $values[0] * $periods[0];
    $itemAnnual1 = $values[1] * $periods[1];
    $itemAnnual2 = $values[2] * $periods[2];
...

$itemAnnual79 = $values[79] * $periods[79];

 

 

And for my previous post, I solved it.
 

Hi, i made a registration page in php, Only problem is its not submitting anything to the database nor throwing back an errors. I'm confused as to why, the code is below any help will be appreciated thanks

** server.php holds the database info i.e

Code: [Select]
<?php 
///Server Info
$dbhost = "localhost";
$dbuser = "*****";
$dbpass = "******";
$dbname = "****";
$conn = mysql_connect($dbhost,$dbuser,$dbpass)
or die();
mysql_select_db($dbname);
?>
Registration page in question;
Code: [Select]
<?php
require_once('check.php');
session_start();
$name = $_SESSION['name'];
require_once('server.php');
require_once('stats.php');
    if($_POST) {
        function VisitorIP()
    { 
    if(isset($_SERVER['HTTP_X_FORWARDED_FOR']))
        $TheIp=$_SERVER['HTTP_X_FORWARDED_FOR'];
    else $TheIp=$_SERVER['REMOTE_ADDR'];
 
    return trim($TheIp);
    }
        $ipaddress = VisitorIP();
        $name = $_POST['username'];
        $namelength = strlen($name);
        $email = $_POST['email'];
        $password = $_POST['password'];
        $passwordlength = strlen($password);
        $confirm = $_POST['confirm'];    
        if($namelength < 3){
            
           $error1="<div class='text1' style='background-color:#FF0;'><span style='color:red'>Error: Your username must be at least 3 characters!</span></div>";
           echo $error1;
          } 
        elseif($passwordlength < 6) {
            $error1="<div class='text1' style='background-color:#FF0;'><span style='color:red'>Error: Password must be at least 6 characters long!</span></div>";
            echo $error1;
        }
        elseif($email == "") {
            $error1="<div class='text1' style='background-color:#FF0;'><span style='color:red'>Error: You must enter an email address!</span></div>";
            echo $error1;
          }   
        elseif($password != $confirm) {
        $error1="<div class='text1' style='background-color:#FF0;'><span style='color:red'>Error: Passwords do not match!</span></div>";
        echo $error1;
          } else {
                include("server.php");
            $query = sprintf("SELECT COUNT(id) FROM players WHERE UPPER(name) = UPPER('%s')",
                mysql_real_escape_string($_POST['username']));
            $result = mysql_query($query);
            list($count) = mysql_fetch_row($result);
            if($count >= 1) { 
$error1="<div class='text1' style='background-color:#FF0;'><span style='color:red'>Error: that username is taken.</span></div>";
echo $error1;

        } else {
                $query1 = sprintf("INSERT INTO players(name,password,email,ip_address) VALUES ('%s','%s', '$email','$ipaddress');",
                    mysql_real_escape_string($_POST['username']),
                    mysql_real_escape_string(md5($password)));
                mysql_query($query1);
            
$error1="<div class='text1' style='background-color:#FF0;'><span style='color:#390'>Congratulations, you registered successfully!</span></div>";
echo $error1;

            }    
         }
    }
?>

Probably real basic but im nto great with the maths aspect of php, how would i get the $level + noto to show from the php below as currently i get,
From: System



4 minutes ago     You have reached level 1 + 1 in Notoriety, Please check the Skill Points section to see if you now qualify for any upgrades!
$sql="INSERT INTO messages (to_username,from_username,message,type, timestamp) VALUES('$playerdata[username]','System','You have reached level $level + 1 in Notoriety, Please check the Skill Points section to see if you now qualify for any upgrades!','Player', NOW())";
mysql_query($sql) or die(mysql_error());

Hello Guys, You  might have known about Luhn Algorithm, which is used to get checksum of IMEI of phones, credit cards etc etc. It is a public domain so it is not used for security but to ensure that client has passed the correct numbers etc etc.   Anyway, I am trying to get my hands on this algorithm and I will build a logic based on luhn algo to get the checksum, where I am stuck is how can I get the alternate numbers from a numeric string, for example I have written the following code to get all the numbers one by one into the array.

$imei = "356565451265856";
$lenOfStr= strlen($imei);
$myArray = array();

//Get all numbers one by one in array
for($i=0; $i < $lenOfStr; $i++){
  $myArray[] = substr($imei,$i,1);
}

// Checking the array
foreach($myArray as $seperatedNumbers){
  echo $seperatedNumbers;
}

No the problem is that I want to select every 2nd number from right to left e-g 5,5,2,... or 6,8,6 How can I get it done?   This logic may not be so good, there may be more brilliant solutions to write luhn algo, but I want to try myself once...    Thanks.
Edited by Digitizer, 31 August 2014 - 04:53 PM.

2 weeks and i think i found a direction as to what i need.I worte a program and it will post to a php page. The php page needs to take the posted variables ($user) ($pass) and compair them aginst the database for existing users  to return a vail or invaild login. It also needs to check and if not exits, save a 3rd and 4th variable to the the database ($serial) ($ip).  Can someone giv eme guadance as to the commands i can research to accomplish this?