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Being Common - MySQL

Setting up an affiliate system on your website can be very lucrative. While there are a lot of details involved, it need not be overly complicated. This article walks you through the steps of creating and setting up a basic affiliate system.

TABLE OF CONTENTS:
  1. Building a Simple Affiliate System in PHP/MySQL
  2. Building The Database
  3. Being Common
  4. Your Index Page
  5. Letting Affiliates Log in
  6. Adding Affiliate Code to Your Site
By: Roger Stringer
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November 10, 2005

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Now, we're also going to create a file called "common.php." This file is very important as it contains functions used by the script.

This script is being built so that the common file is the brains of the whole system.

<?
  session_start();
  include("config.php");
  $dbh=mysql_connect ($dbhost, $dbuser, $dbpassword) or die ('I cannot connect to the database because: ' . mysql_error());
  mysql_select_db ($dbname,$dbh);
  define("DBH",$dbh);

  $affiliateForm = array(
      "username"=&gt;array("User Name","text",""),
      "password"=&gt;array("Password","password",""),
      "site"=&gt;array("Your Web Site","text","http://"),
      "email"=&gt;array("Your Email","text","yourname@yoursite.com"),
      "akey"=&gt;array("","hidden",""),
      "ptype"=&gt;array("Payment Method","select","check|paypal"),
      "pemail"=&gt;array("Paypal Email","text",""),
      "address"=&gt;array("Your Address","textarea","")
  );
  function makeKey($len){
      $chars=
'ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuv
        wxyz0123456789'; // characters to use in the password
      mt_srand((double)microtime()*1000000^getmypid());
      while(strlen($password)&lt;$len){
        $password.=substr($chars,(mt_rand()%strlen($chars)),1);
      }
      return $password;
  }

  function AffiliateAdd(){
      $_POST['akey'] = makeKey(10);
      unset($_POST['ID']);
      unset($_POST['step']);
      $query = "INSERT INTO affiliates (".implode(", ",array_keys($_POST)).") VALUES ('".implode("', '",array_map("mysql_real_escape_string",$_POST))."')";
      mysql_query($query,DBH) or die( mysql_error() );
      return mysql_insert_id();
  }

  function AffiliateUpdate($aid){
      unset($_POST['step']);
      $query = "UPDATE affiliates SET ";
      foreach($_POST as $field =&gt; $value) {
        $query .= "$field = \"".mysql_real_escape_string($value)."\", ";
      }
      $query = substr($query, 0, strlen($query)-2)." WHERE ID = '{$aid}'";
      mysql_query($query,DBH) or die( mysql_error() );
  }

  function AffiliateStats($aid=""){
      $sql = "SELECT * FROM affiliates WHERE ID='{$aid}'";
      $lo = mysql_query( $sql );
      $affi = mysql_fetch_assoc($lo);
      list($clicks) = mysql_fetch_row( mysql_query("SELECT COUNT(*) FROM affstats WHERE akey= '{$affi['akey']}'") );
      list($orders) = mysql_fetch_row( mysql_query("SELECT COUNT(*) FROM affstats WHERE akey= '{$affi['akey']}' AND type=2") );
      list($pending_total) = mysql_fetch_row( mysql_query("SELECT SUM(price) FROM affstats WHERE akey= '{$affi['akey']}' AND type=2 AND paid=0") );
      list($paid_total) = mysql_fetch_row( mysql_query("SELECT SUM(price) FROM affstats WHERE akey= '{$affi['akey']}' AND type=2 AND paid=1") );
      $total = $clicks+$orders;
      $order_total = $pending_total+$paid_total;
      $return = array(
        "total"=&gt;$total,
        "clicks"=&gt;$clicks,
        "orders"=&gt;$orders,
        "pending_total"=&gt;$pending_total,
        "paid_total"=&gt;$paid_total,
        "order_total"=&gt;$order_total
      );
      return $return;
  }
?>

Most of these functions are pretty straightforward; you can figure them out just from their names.

Look And Feel

There are two files that need to be created to give the site its look and feel.

The first one is "header.php." This is the header for the site; change it to integrate more with your existing site:

<html>
<head>
  <title><?=$sitename?> Affiliate Center</title>
</head>
<body>
  <h1><?=$sitename?> Affiliate Center</h1>

Finally, we have "footer.php", this is the other half of the look and feel of your site:

  <hr/>
  copyright 2005, <?=$sitename?>, <?=$siteurl?>

These can be changed quite easily, and changing them changes the whole look of the affiliate script.



 
 
>>> More MySQL Articles          >>> More By Roger Stringer
 

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