PayPal IPN无法更新MySQL数据库

Question

please excuse my ignorance in advance, but i'm fairly new to php, and this one has been bugging me for a while. i'm trying to write an IPN script for an online store that sells individual items. once the payment is complete, the script will update the database and change the availability from "available" to "unavailable". the IPN seems to work fine apart from updating the database. i'm at my wits end now as i can't see what is wrong with the script. here's what i have:

curl_close($ch);

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

$token = $_POST['invoice'];
$item= $_POST['invoice'];

$conn=new PDO("mysql:host=SERVER;dbname=MYDATABASE","NAME","PASS");
if ($_POST['payment_status'] == 'completed')
{
   $sql="UPDATE `tbl_products` SET `id_status` = 3 WHERE `id_product`=:idproduct";
   $stmt=$conn->prepare($sql);
   $stmt->bindParam(':idproduct',$item);
   $stmt->execute();
}
if ($_POST['payment_status'] == 'pending')
{
    $sql="UPDATE `tbl_products` SET `id_status` = 2 WHERE `id_product`=:idproduct";
    $stmt=$conn->prepare($sql);
    $stmt->bindValue(':idproduct',$item);
    $stmt->execute();
}
foreach ($_POST as $key => $value)
{
    $emailtext .= $key . " = " .$value ."\n\n";
}
mail("MYEMAIL", "Live-VALID IPN", $emailtext . "\n\n" . $req);
}
else if (strcmp ($res, "INVALID") == 0)
{
// log for manual investigation
foreach ($_POST as $key => $value)
{
    $emailtext .= $key . " = " .$value ."\n\n";
}
mail("MYEMAIL", "Live-INVALID IPN", $emailtext . "\n\n" . $req);
}

Answer 1

Paypal IPN returned status have first character uppercase.

So Completed is not equal to completed . Try this

curl_close($ch);

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

$token = $_POST['invoice'];
$item= $_POST['invoice'];

$conn=new PDO("mysql:host=SERVER;dbname=MYDATABASE","NAME","PASS");
if ($_POST['payment_status'] == 'Completed')
{
   $sql="UPDATE `tbl_products` SET `id_status` = 3 WHERE `id_product`=:idproduct";
   $stmt=$conn->prepare($sql);
   $stmt->bindParam(':idproduct',$item);
   $stmt->execute();
}
if ($_POST['payment_status'] == 'Pending')
{
    $sql="UPDATE `tbl_products` SET `id_status` = 2 WHERE `id_product`=:idproduct";
    $stmt=$conn->prepare($sql);
    $stmt->bindValue(':idproduct',$item);
    $stmt->execute();
}
foreach ($_POST as $key => $value)
{
    $emailtext .= $key . " = " .$value ."\n\n";
}
mail("MYEMAIL", "Live-VALID IPN", $emailtext . "\n\n" . $req);
}
else if (strcmp ($res, "INVALID") == 0)
{
// log for manual investigation
foreach ($_POST as $key => $value)
{
    $emailtext .= $key . " = " .$value ."\n\n";
}
mail("MYEMAIL", "Live-INVALID IPN", $emailtext . "\n\n" . $req);
}

It is better to store the status in a variable and use php strtolower function to make them lower case.

$paypalStatus = strtolower($_POST['payment_status']);

Than do the check like this

if($paypalStatus == 'pending')