php - I can't seem to find why this IPN code is not updating database -

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i ran code without errors database not updating. receiving variable data paypal correctly. verify post data added 2 lines @ beginning of script write variables text file. server uses php 5.4. hope guys can find problem.

<?php    /* checking post variables & writing text file */ $posted_data = print_r($_post,true); file_put_contents('ipn_data.txt',$posted_data);  /*  database config here  */  /* connect database */  $conn = new mysqli($db_host, $db_user, $db_pass, $db_database); if ($conn->connect_error) {             die("connection failed: " . $conn->connect_error);         }  //read post paypal system , add 'cmd'  $req = 'cmd=_notify-validate';   foreach ($_post $key => $value) {   $value = urlencode(stripslashes($value));  $req .= "&$key=$value";  }   //post paypal system validate  $header = "post /cgi-bin/webscr http/1.1\r\n";  $header .= "content-type: application/x-www-form-urlencoded\r\n";  $header .= "host: www.sandbox.paypal.com\r\n";  $header .= "connection: close\r\n";  $header .= "content-length: " . strlen($req) . "\r\n\r\n";  $fp = fsockopen ('ssl://www.sandbox.paypal.com', 443, $errno, $errstr, 30);  //   $item = $_post['item_name']; $transaction_id = $_post['txn_id']; $payeremail = $_post['payer_email'];  //error connecting paypal  if (!$fp) {  //  }   //successful connection      if ($fp) {  fputs ($fp, $header . $req);   while (!feof($fp)) {      $res = fgets ($fp, 1024);      $res = trim($res); //new & important       if (strcmp($res, "verified") == 0) {          //insert order database           if (strcmp ($payment_status, "completed") == 0) {             /* update database */            if($item == 'learn html'){                     $sql = "insert dc_html (transaction_id,email_id)                     values ( '$transaction_id','$payeremail')";                     $conn->close();                     break;             }             if($item == 'learn css') {                     $sql = "insert dc_css (transaction_id,email_id)                     values ( '$transaction_id','$payeremail')";                     $conn->close();                     break;            }          }          }       if (strcmp ($res, "invalid") == 0) {          //insert db in table bad payments process later      }  }   fclose($fp);  }   ?>

you seem assign query $sql variable not appear in code call $conn->query($sql).

if not execute query how inserted database?

also adding logging might debug more easily.

like send email or write error file if

  • postback fails
  • db connection fails
  • db query execution fails

hope helps.


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