PHP and Paypal IPN Subscription and recurring payments

Hi

I am about to start a membership website where you have to subscribe to gain access.

I have a user registration system in place but how do I encoperate Paypal IPN Subscription and recurring payments in it?

Any Ideas or samples or tutorials out there?

Thanks

 

So I guess the user has to keep up the subscription for access right ??

Do you know how standard IPN works, like one time buttons ??

And how much help do you want, ideas or actual code ??

 

First question is a yes
second question is a yes too

and third question is I need sample code to show me how to go about it

 

Well the subscriptions don't work differently to the normal payments everytime the subscription is renewed on paypal ( or cancelled or whatever ) your ipn script will be executed. Obviously there are differences, but its not like you have to learn anything new there.

So then, in the most basic terms, you incorporate a normal ipn system ( there is a ipn handler on krakjoe.com that uses curl if you wanna save yourself ten minutes ), and a field in the members table ( enum ) to dictate wether the users payment is active, upon the inital ipn you update the enum field to one ( or whatever is appropropriate, depending on how many IPN status's you wanna handle ), and everytime your ipn script is executed after that update your enum field accordingly.

If you implement the way you think will work and then post or pm me the code, I'll happily look over it for you, but really the only code I could post that I know will be useful at this point ( as you obviously know how to program already ) would be the ipn handler, which I already wrote ......

 

OK where can I get a list of all the required parameters so I know what I need to work with?


forexample, how do i set the page it returns to when they renew/cancel or even scubscribe for the first time?

 

http://www.europeantrimming.co.uk/uploads/subscriptions.pdf

That has all the information you will ever need, and is far more detailed than I can remember......

 

Hello,

I am now emerging from two days of coding and unsuccess in setting up recurring payment with IPN - I have read all the IPN manual and also suggested on this site

Ok first off, let me start with saying that I have in the past and already succeed in setting up IPN (without "recurring payment"). So to this point it worked with no flaws.

Since two days, I am trying to set a recurring option but without success.

I use two codes for managing my IPN script

One called paypal.php and paypal.class

the paypal. php is the one where I set my variables,

include ("../conf/conn.php");
include ("../conf/paypalconf.php");

require_once('paypal.class.php');
$p = new paypal_class;
$p->paypal_url = 'https://www.sandbox.paypal.com/cgi-bin/webscr';

$this_script = 'MYDOMAIN.COM/paypal.php';

if (empty($_GET['action'])) $_GET['action'] = 'process';  

switch ($_GET['action']) {
    
   case 'process': 
      $p->add_field('username', $_POST['paypalemail']);
      $p->add_field('business', $owner_paypal_email);
      $p->add_field('return', $this_script.'?action=success');
      $p->add_field('cancel_return', $this_script.'?action=cancel');
      $p->add_field('notify_url', $this_script.'?action=ipn');
      $p->add_field('item_name', $item_name.$_POST['login']);
      $p->add_field('amount', $price);
//MY THREE VARIABLES FOR RECURING
$p->add_field('reattempt', '1');
$p->add_field('recur_times', '1');
$p->add_field('recurring', '1');
      $p->add_field('custom', $_POST['login']);
      $p->submit_paypal_post();
      break;
      
   case 'success':
 
      echo "Thanks for your order, your invoice will be automatically activated once payment is received<br />";
      echo "Click <a href='index.php?action=li'>here</a> to continue</a>";
      break;
      
   case 'cancel':
 
      echo "The order was canceled. Please retry again<br />";
      
      break;
      
   case 'ipn':
      
      if ($p->validate_ipn()) {
      	mysql_query("UPDATE subscriptions SET activated='1' WHERE login='".$p->ipn_data['custom']."'");

      }
      break;
 }     

?>

Code (markup):

Ok so, as I said this code worked with no problem, but now I added three more variables whih I assumed would set up a "monthly recuring payment, but with no success

$p->add_field('reattempt', '1');
$p->add_field('recur_times', '1');
$p->add_field('recurring', '1');

Am I doing anything wrong.

For more information, here is the paypal.class I use

<?php
class paypal_class {
    
   var $last_error;                 
   
   var $ipn_log;                    
   var $ipn_log_file;               
   var $ipn_response;                  
   var $ipn_data = array();         
   
   var $fields = array();           

   
   function paypal_class() {
      
      $this->paypal_url = 'https://www.paypal.com/cgi-bin/webscr';
      
      $this->last_error = '';
      
      $this->ipn_log_file = 'ipn_log.txt';
      $this->ipn_log = true;
      $this->ipn_response = '';

      $this->add_field('rm','2');       
      $this->add_field('cmd','_xclick'); 
      
   }
   
   function add_field($field, $value) {
      
      $this->fields["$field"] = $value;
   }

   function submit_paypal_post() {

      echo "<html>\n";
      echo "<head><title>Processing Payment...</title></head>\n";
      echo "<body onLoad=\"document.form.submit();\">\n";
      echo "<center><h3>Please wait, your order is being processed...</h3></center>\n";
      echo "<form method=\"post\" name=\"form\" action=\"".$this->paypal_url."\">\n";

      foreach ($this->fields as $name => $value) {
         echo "<input type=\"hidden\" name=\"$name\" value=\"$value\">";
      }
 
      echo "</form>\n";
      echo "</body></html>\n";
    
   }
   
   function validate_ipn() {
      $url_parsed=parse_url($this->paypal_url);        
      $post_string = '';    
      foreach ($_POST as $field=>$value) { 
         $this->ipn_data["$field"] = $value;
         $post_string .= $field.'='.urlencode($value).'&'; 
      }
      $post_string.="cmd=_notify-validate";
      $fp = fsockopen($url_parsed[host],"80",$err_num,$err_str,30); 
      if(!$fp) {
         $this->last_error = "fsockopen error no. $errnum: $errstr";
         $this->log_ipn_results(false);       
         return false;
         
      } else { 
         fputs($fp, "POST $url_parsed[path] HTTP/1.1\r\n"); 
         fputs($fp, "Host: $url_parsed[host]\r\n"); 
         fputs($fp, "Content-type: application/x-www-form-urlencoded\r\n"); 
         fputs($fp, "Content-length: ".strlen($post_string)."\r\n"); 
         fputs($fp, "Connection: close\r\n\r\n"); 
         fputs($fp, $post_string . "\r\n\r\n"); 
		 while(!feof($fp)) { 
            $this->ipn_response .= fgets($fp, 1024); 
         } 

         fclose($fp);

      }
      
      if (eregi("VERIFIED",$this->ipn_response)) {
         $this->log_ipn_results(true);
         return true;       
         
      } else {
  
         $this->last_error = 'IPN Validation Failed.';
         $this->log_ipn_results(false);   
         return false;
         
      }
      
   }
   
   function log_ipn_results($success) {
       
      if (!$this->ipn_log) return;

      $text = '['.date('m/d/Y g:i A').'] - '; 
    
      if ($success) $text .= "SUCCESS!\n";
      else $text .= 'FAIL: '.$this->last_error."\n";
      
      $text .= "IPN POST Vars from Paypal:\n";
      foreach ($this->ipn_data as $key=>$value) {
         $text .= "$key=$value, ";
      }
 
      $text .= "\nIPN Response from Paypal Server:\n ".$this->ipn_response;
      
      $fp=fopen($this->ipn_log_file,'a');
      fwrite($fp, $text . "\n\n"); 

      fclose($fp);
   }

   function dump_fields() {
      
      echo "<h3>paypal_class->dump_fields() Output:</h3>";
      echo "<table width=\"95%\" border=\"1\" cellpadding=\"2\" cellspacing=\"0\">
            <tr>
               <td bgcolor=\"black\"><b><font color=\"white\">Field Name</font></b></td>
               <td bgcolor=\"black\"><b><font color=\"white\">Value</font></b></td>
            </tr>"; 
      
      ksort($this->fields);
      foreach ($this->fields as $key => $value) {
         echo "<tr><td>$key</td><td>".urldecode($value)." </td></tr>";
      }
 
      echo "</table><br>"; 
   }
}         

Code (markup):

Thanks a lot for your all help.

 

i am using same code for recuring but i cant done recuring in this problam . i hava fazing same prblm .i need you help . so send me any code or define me how i can enable recuring in my code

thanks
vivek khatri

 

hi sir i need ur help

sir i m working on recuring in paypal but i couldnt find any solution.

please send me any code that i m use

or give me any idea

i check ur pdf file

but i got error like
secuty error in code
or
invalid token id

thanks

 

Hello krakjoe's and all..


Can you please help me to answer my doubt.
I need to setup paypal auto renewal for my customers in website.
actually customer will get 30 days website access on every month payment.

if the monthly auto payment is ok we can increase "website access" days by 30.
if no it will not add any more days to customers account.

that means i need to RUN a SCRIPT from my own website to check and increase or stop customers "website access" days after each auto payment.


can we set up paypal auto renewal like this?
is there any method to run a script (mywebsite.com/renewalscript.php?customerid=123&payment=ok) after every auto renewal ?
or do you have any other idea to overcome this ?

please advice me

 

humm i have the exact same question, how is this done?