Question

I have never coded php before and I really need this very simple script.

so let me explain what I need.
user comes to my website via affiliate link so when they finished redirecting
the url will look like this

http://website.com/lp/index.html?sub=1&customer_id=1039be6e23b4420c3e1063dc44a04d

now I have a download link on my website
On download click
check for duplicate ip address from database. if not duplicate
capture sub=”” & customer_id=”” from the address bar.
save to database with IP Address (this for tracking)

and redirect immediately to the download link

if the ip is not duplicated

 http://dl.website.com/download/downloadpop.aspx?id={Customer_id}

if it’s duplicated

http://dl.website.com/download/downloadpop.aspx?id=beenbefore

Thank you so much!

Answer 1

This is rather broad, and impossible to answer properly without knowing any details about your database structure, but here’s how the basics of this would work:

<?php

$sub = $_GET['sub'];
$customer_id = $_GET['customer_id'];
$ip = $_SERVER['REMOTE_ADDR'];

$db = mysql_connect(...) or die(mysql_error());

$quoted_sub = mysql_real_escape_string($sub);
$quoted_customer_id = mysql_real_escape_string($customer_id);
$quoted_ip = mysql_real_escape_string($ip);

$sql = "SELECT count(*) AS cnt FROM yourtable WHERE ip_address = '$quoted_id'";
$result = msyql_query($sql) or die(mysql_error());
$row = mysql_fetch_assoc($result);
if ($row['cnt'] == 0) {
    $enc = urlencode($customer_id);
    ... IP isn't in the database, so do the insert stuff ...
    header(" http://dl.website.com/download/downloadpop.aspx?id=$enc");
} else {
    header("Location: http://dl.website.com/download/downloadpop.aspx?id=beenbefore");
}

exit();