Story_Teller

when you want to transaction through paypal, there are 2(two) situation created

situation 1: Suppose you have a paypal account.You want to sell something and want to make money transaction through paypal. Now there are a critical situation. When someone buy your product through paypal, suppose a software, you want that automatically a license key will send to that user if payment make successful. So, here is the integration process step by step: Put this code in your site:

 <form id=”formpay” action=”https://www.paypal.com/cgi-bin/webscr” method=”POST” >
<input type=”hidden” name=”cmd” value=”_xclick”>
<input type=”hidden” name=”business” value=”yourpaypalemail@email.com”>
<input type=”hidden” name=”item_name” value=”name of the item”>
<input type=”hidden” name=”item_number” value=”1″>
<input type=”hidden” name=”no_shipping” value=”1″>
<input type=”hidden” name=”return” value=”http://yoursite.com/success”>
<input type=”hidden” name=”notify_url” value=”http://yoursite.com/notifyme”>
<input type=”hidden” name=”currency_code” value=”USD”>
<input type=”hidden” name=”amount” value=”4″>
<input type=”image” src=”http://www.paypal.com/en_US/i/btn/x-click-but01.gif” name=”submit” alt=”Make payments with PayPal - it’s fast, free and secure!”>
</form>

This is the html code, that makes a visual paypal button in your site. Look carefully, the action of form remain same as here. If you want a normal buy button, then input name “cmd” its value should be =”_xclick”. input name “business” it’s value should be the email address you registered in paypal. Input name amount contains the price you set as a value. Now the most important input fields are “return” and “notify_url”. “return” field contains that url address, when purchase become successful and you want to show user some message like “congratulation, your purchase is successful”. As soon as purchase makes complete paypal dump some values to your “notify_url”. So, in this field, you should put that url of your site that makes some changes like database update or send any special email.

Now download this free code : http://www.hotscripts.com/Detailed/46734.html After downloading, unzip the zip file. You’ll get two php files. Now copy this file paypal.class.php into your project. Suppose your notify_url field is: http://abdullah.com/notify.php
Now write this code in notify.php

<?php
require_once(’paypal.class.php’);  // include the class file
$p = new paypal_class;             // initiate an instance of the class
if ($p->validate_ipn()) {
// Payment has been recieved and IPN is verified.  This is where you
// update your database to activate or process the order, or setup
// the database with the user’s order details, email an administrator,
// etc.  You can access a slew of information via the ipn_data() array.
// Check the paypal documentation for specifics on what information
// is available in the IPN POST variables.  Basically, all the POST vars
// which paypal sends, which we send back for validation, are now stored
// in the ipn_data() array.
// For this example, we’ll just email ourselves ALL the data.
$subject = ‘Instant Payment Notification - Recieved Payment’;
$to = ‘YOUR EMAIL ADDRESS HERE’;    //  your email
$body =  “An instant payment notification was successfully recieved\n”;
$body .= “from “.$p->ipn_data['payer_email'].” on “.date(’m/d/Y’);
$body .= ” at “.date(’g:i A’).”\n\nDetails:\n”;
foreach ($p->ipn_data as $key => $value) { $body .= “\n$key: $value”; }
mail($to, $subject, $body);
}
?>

So, if $p->validate_ipn() returns true, that means payment verified and you received the payment. And if it returns false, then you’ve to consider that for some reason payment doesn’t make successful.

situation 2: Suppose you want to make a subscription form. Subscripted fee may be charged daily, weekly, monthly or yearly. Suppose you want a yearly subscription form. So, any user who pays you, he have to pay yearly, otherwise his membership will cancel.
Solution: Here is the html code for the form. Look the changes. form action remains same as above. input field cmd is changed. Look the value of it. 5 new input field added here. For subscription form, notify_url be the same and you could use the paypal.class.php and like the previous way, you could check whether payment makes successful or not.

<form id=”fromsub” action=”https://www.paypal.com/cgi-bin/webscr” method=”POST” >
<input type=”hidden” name=”cmd” value=”_xclick-subscriptions”>
<input type=”hidden” name=”business” value=”yourpaypalemail@email.com”>
<input type=”hidden” name=”item_name” value=”name of the item”>
<input type=”hidden” name=”item_number” value=”1″>
<input type=”hidden” name=”no_shipping” value=”1″>
<input type=”hidden” name=”return” value=”http://yoursite.com/success”>
<input type=”hidden” name=”notify_url” value=”http://yoursite.com/notifyme”>
<input type=”hidden” name=”currency_code” value=”USD”>
<input type=”hidden” name=”amount” value=”4″>
<input type=”hidden” name=”a3″ value=”5″>
<input type=”hidden” name=”p3″ value=”1″>
<input type=”hidden” name=”t3″ value=”Y”>
<input type=”hidden” name=”src” value=”1″>
<input type=”hidden” name=”sra” value=”1″>
<input type=”image” src=”https://www.paypal.com/images/x-click-but20.gif” name=”submit” alt=”Make payments with PayPal - it’s fast, free and secure!”>
</form>