credit users account after paypal payment?

[crf1121359]

Hi gys,

 

This is a follow up on my last post. I finally managed to sort out the paypal IPN issue that I had. its sending the information and it also logs the information into my database. so no issue there any more.

 

But now I need to credit the users account with the amount of credit they've paid for after successful payment.

 

I have a database with a table called members and a column called balance.

 

How can I update the members balance field after successful payment?

 

this is the ipn.php file code:

 

<?php
// Database variables
$host = "localhost"; //database location
$user = "XXXXXXX"; //database username
$pass = "XXXXXXX"; //database password
$db_name = "XXXXXXXX"; //database name
$test_email="";
// PayPal settings
$paypal_email = 'XXXXXXX@gmail.com';
$return_url = 'http://www.XXXX/successful.php';
$cancel_url = 'http://www.XXXX/payment-cancelled.htm';
$notify_url = 'http://www.XXXXXX/payments.php';
$item_name = 'Test Item';
$item_amount = 'amount';
// Include Functions
include("functions.php");
//Database Connection
$link = mysql_connect($host, $user, $pass);
mysql_select_db($db_name);
// Check if paypal request or response
if (!isset($_POST["txn_id"]) && !isset($_POST["txn_type"])){
// Firstly Append paypal account to querystring
$querystring .= "?business=".urlencode($paypal_email)."&";

// Append amount& currency (£) to quersytring so it cannot be edited in html

//The item name and amount can be brought in dynamically by querying the $_POST['item_number'] variable.
$querystring .= "item_name=".urlencode($item_name)."&";
$querystring .= "amount=".urlencode($item_amount)."&";

//loop for posted values and append to querystring
foreach($_POST as $key => $value){
 $value = urlencode(stripslashes($value));
 $querystring .= "$key=$value&";
}

// Append paypal return addresses
$querystring .= "return=".urlencode(stripslashes($return_url))."&";
$querystring .= "cancel_return=".urlencode(stripslashes($cancel_url))."&";
$querystring .= "notify_url=".urlencode($notify_url);

// Append querystring with custom field
//$querystring .= "custom=".USERID;

// Redirect to paypal IPN
header('location:https://www.sandbox.paypal.com/cgi-bin/webscr'.$querystring);
exit();
}else{

// Response from Paypal
// read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-validate';
foreach ($_POST as $key => $value) {
 $value = urlencode(stripslashes($value));
 $value = preg_replace('/(.*[^%^0^D])(%0A)(.*)/i','${1}%0D%0A${3}',$value);// IPN fix
 $req .= "&$key=$value";

}

// assign posted variables to local variables
$data['item_name']   = $_POST['item_name'];
$data['item_number']   = $_POST['item_number'];
$data['payment_status']  = $_POST['payment_status'];
$data['payment_amount']  = $_POST['mc_gross'];
$data['payment_currency'] = $_POST['mc_currency'];
$data['txn_id']    = $_POST['txn_id'];
$data['receiver_email']  = $_POST['receiver_email'];
$data['amount']    = $_POST['amount'];
$data['custom']    = $_POST['custom'];
$payment_status    = $_POST['payment_status'];

// post back to PayPal system to validate
$header = "POST /cgi-bin/webscr HTTP/1.0\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen($req) . "\r\n\r\n";

//  $paypal_url = "www.paypal.com";
$paypal_url = "www.sandbox.paypal.com";
 $fp = fsockopen ($paypal_url, 80, $errno, $errstr, 30);

if (!$fp) {
 // HTTP ERROR
} else {
 fputs ($fp, $header . $req);
 while (!feof($fp)) {
  $res = fgets ($fp, 4096);

  if($payment_status == "Completed" || $payment_status == "Pending"){
   // Validate payment (Check unique txnid & correct price)
   $valid_txnid = check_txnid($data['txn_id']);
   $valid_price = check_price($data['payment_amount'], $data['item_number']);
   // PAYMENT VALIDATED & VERIFIED!
   if($valid_txnid && $valid_price){   
 $orderid = updatePayments($data);
 if($orderid){	
  // Payment has been made & successfully inserted into the Database  
  @mail($test_email, "PAYPAL DEBUGGING", "Payment has been made & successfully inserted into the Database");
  exit();   
 }else{	   
  // Error inserting into DB
  // E-mail admin or alert user
  @mail($test_email, "PAYPAL DEBUGGING", "Error inserting into DB");
  exit();
 }
   }else{	
 // Payment made but data has been changed
 // E-mail admin or alert user

 //
 @mail($test_email, "PAYPAL DEBUGGING", "Payment made but data has been changed");
 exit();
   }	 


  }
  if (strcmp($res, "VERIFIED") == 0) {

   // Used for debugging
   @mail($test_email, "PAYPAL DEBUGGING", "Verified Response<br />data = <pre>".print_r($post, true)."</pre>");

   // Validate payment (Check unique txnid & correct price)
   $valid_txnid = check_txnid($data['txn_id']);
   $valid_price = check_price($data['payment_amount'], $data['item_number']);
   // PAYMENT VALIDATED & VERIFIED!
   if($valid_txnid && $valid_price){   
 $orderid = updatePayments($data);
 if($orderid){	
  // Payment has been made & successfully inserted into the Database  
  @mail($test_email, "PAYPAL DEBUGGING", "Payment has been made & successfully inserted into the Database");	
 }else{	   
  // Error inserting into DB
  // E-mail admin or alert user
  @mail($test_email, "PAYPAL DEBUGGING", "Error inserting into DB");
 }
   }else{	
 // Payment made but data has been changed
 // E-mail admin or alert user

 //
 @mail($test_email, "PAYPAL DEBUGGING", "Payment made but data has been changed");
   }	 

  }else if (strcmp ($res, "INVALID") == 0) {

   // PAYMENT INVALID & INVESTIGATE MANUALY!
   // E-mail admin or alert user

   // Used for debugging
   @mail($test_email, "PAYPAL DEBUGGING", "Invalid Response<br />data = <pre>".print_r($post, true)."</pre>");
  } 
 } 
fclose ($fp);
}
}
?>

 

And this is the code for function.php

 

<?php
// functions.php
function check_txnid($tnxid){
global $link;
return true;
$valid_txnid = true;
   //get result set
   $sql = mysql_query("SELECT * FROM `payments` WHERE txnid = '$tnxid'", $link); 
if($row = mysql_fetch_array($sql)) {
    $valid_txnid = false;
}
   return $valid_txnid;
}
function check_price($price, $id){
   $valid_price = false;
   //you could use the below to check whether the correct price has been paid for the product

/*
$sql = mysql_query("SELECT amount FROM `products` WHERE id = '$id'"); 
   if (mysql_numrows($sql) != 0) {
 while ($row = mysql_fetch_array($sql)) {
  $num = (float)$row['amount'];
  if($num == $price){
   $valid_price = true;
  }
 }
   }
return $valid_price;
*/
return true;
}
function updatePayments($data){
   global $link;
if(is_array($data)){   
    $sql = mysql_query("INSERT INTO `payments` (txnid, payment_amount, payment_status, itemid, createdtime) VALUES (
		    '".$data['txn_id']."' ,
		    '".$data['payment_amount']."' ,
		    '".$data['payment_status']."' ,
		    '".$data['item_number']."'  ,
		    '".date("Y-m-d H:i:s")."'
		    )", $link);
   return mysql_insert_id($link);
   }
}
?>

 

the function.php file works with the ipn.php file in order to send information back and forth to paypal and updates the mysql database.

 

 

any help would be appreciated.

 

Thanks

[Zane]

[crf1121359]

Adam's toturials are good but not what I want. Thanks anyway.