php - 如何调试变量未发布到 MYSQL 数据库

Question

我正在尝试找出如何调试将变量发布到数据库的问题。所有内容都已发布，但用户名除外。任何有关如何调试此问题的提示将不胜感激。

用户名首先会运行几个函数。我没有收到脚本本身的任何错误，但我也没有将任何内容发布到数据库。

<?php

// Check to see there are posted variables coming into the script
if ($_SERVER['REQUEST_METHOD'] != "POST") die ("No Post Variables");
// Initialize the $req variable and add CMD key value pair
$req = 'cmd=_notify-validate';
// Read the post from PayPal
foreach ($_POST as $key => $value) {
    $value = urlencode(stripslashes($value));
    $req .= "&$key=$value";
}
// Now Post all of that back to PayPal's server using curl, and validate everything with PayPal
// We will use CURL instead of PHP for this for a more universally operable script (fsockopen has issues on some environments)
//$url = "https://www.sandbox.paypal.com/cgi-bin/webscr";
$url = "https://www.paypal.com/cgi-bin/webscr";
$curl_result=$curl_err='';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/x-www-form-urlencoded", "Content-Length: " . strlen($req)));
curl_setopt($ch, CURLOPT_HEADER , 0);   
curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
$curl_result = @curl_exec($ch);
$curl_err = curl_error($ch);
curl_close($ch);

$req = str_replace("&", "\n", $req);  // Make it a nice list in case we want to email it to ourselves for reporting

// Check that the result verifies
if (strpos($curl_result, "VERIFIED") !== false) {
    $req .= "\n\nPaypal Verified OK";
} else {
    $req .= "\n\nData NOT verified from Paypal!";
    mail(".com", "IPN interaction not verified", "$req", "From: .com" );
    exit();
}

/* CHECK THESE 4 THINGS BEFORE PROCESSING THE TRANSACTION, HANDLE THEM AS YOU WISH
1. Make sure that business email returned is your business email
2. Make sure that the transaction’s payment status is “completed”
3. Make sure there are no duplicate txn_id
4. Make sure the payment amount matches what you charge for items. (Defeat Price-Jacking) */

// Check Number 1 ------------------------------------------------------------------------------------------------------------
$receiver_email = $_POST['receiver_email'];
if ($receiver_email != ".com") {
    $message = "Investigate why and how receiver email is wrong. Email = " . $_POST['receiver_email'] . "\n\n\n$req";
    mail(".com", "Receiver Email is incorrect", $message, "From: .com" );
    exit(); // exit script
}
// Check number 2 ------------------------------------------------------------------------------------------------------------
if ($_POST['payment_status'] != "Completed") {
    // Handle how you think you should if a payment is not complete yet, a few scenarios can cause a transaction to be incomplete
}
// Connect to database ------------------------------------------------------------------------------------------------------
require_once 'connect_to_mysql.php';
// Check number 3 ------------------------------------------------------------------------------------------------------------
$this_txn = $_POST['txn_id'];
$sql = mysql_query("SELECT id FROM transactions WHERE txn_id='$this_txn' LIMIT 1");
$numRows = mysql_num_rows($sql);
if ($numRows > 0) {
    $message = "Duplicate transaction ID occured so we killed the IPN script. \n\n\n$req";
    mail(".com", "Duplicate txn_id in the IPN system", $message, "From: .com" );
    exit(); // exit script
} 
// Check number 4 ------------------------------------------------------------------------------------------------------------
$product_id_string = $_POST['custom'];
$product_id_string = rtrim($product_id_string, ","); // remove last comma
// Explode the string, make it an array, then query all the prices out, add them up, and make sure they match the payment_gross amount
$id_str_array = explode(",", $product_id_string); // Uses Comma(,) as delimiter(break point)
$fullAmount = 0;
foreach ($id_str_array as $key => $value) {

    $id_quantity_pair = explode("-", $value); // Uses Hyphen(-) as delimiter to separate product ID from its quantity
    $product_id = $id_quantity_pair[0]; // Get the product ID
    $product_quantity = $id_quantity_pair[1]; // Get the quantity
    $sql = mysql_query("SELECT price FROM products WHERE id='$product_id' LIMIT 1");
    while($row = mysql_fetch_array($sql)){
        $product_price = $row["price"];
    }
    $product_price = $product_price * $product_quantity;
    $fullAmount = $fullAmount + $product_price;
}
$fullAmount = number_format($fullAmount, 2);
$grossAmount = $_POST['mc_gross']; 
if ($fullAmount != $grossAmount) {
        $message = "Possible Price Jack: " . $_POST['payment_gross'] . " != $fullAmount \n\n\n$req";
        mail(".com", "Price Jack or Bad Programming", $message, "From: .com" );
        exit(); // exit script
} 

//
//
require_once 'connect_to_mysql.php';

//now to always get unique username
$username = substr($payer_email, 0, strpos($payer_email, '@'));
if ( ! uniqueName($username))
{
    $username = makeUniqueName($username);
}


//function to check if is the existing username
function uniqueName($username)
{
    $sql = mysql_query("SELECT username FROM transactions WHERE username='$username'");
    $numRows = mysql_num_rows($sql);
    if ($numRows > 0)
    {
        return false;
    }

    return true;
}


//function to generate new unique username
function makeUniqueName($username)
{
    //serch username string for number at the end
    //regexp makes sure all preceeding zeroes go to first match group
    if (preg_match('/^(\S*?0*)?(\d+?)$/', $username, $match))
    {
        //we got digit from the end of string, just add 1 to the digit
        $username = $match[1] . ($match[2] + 1);
    }
    else
    {
        //no digit at the end of string, just add digit 1 at the end
        $username = $username . 1;
    }

if (uniqueName($username))
{
    return $username;
}

    return makeUniqueName($username);
}

// END ALL SECURITY CHECKS NOW IN THE DATABASE IT GOES ------------------------------------
////////////////////////////////////////////////////
// Homework - Examples of assigning local variables from the POST variables
$txn_id = $_POST['txn_id'];
$payer_email = $_POST['payer_email'];
$custom = $_POST['custom'];
$first_name = $_POST['first_name'];
$last_name = $_POST['last_name'];
$payment_date = $_POST['payment_date'];
$mc_gross = $_POST['mc_gross'];
$payment_currency = $_POST['payment_currency'];
$txn_id = $_POST['txn_id'];
$receiver_email = $_POST['receiver_email'];
$payment_type = $_POST['payment_type'];
$payment_status = $_POST['payment_status'];
$txn_type = $_POST['txn_type'];
$payer_status = $_POST['payer_status'];
$address_street = $_POST['address_street'];
$address_city = $_POST['address_city'];
$address_state = $_POST['address_state'];
$address_zip = $_POST['address_zip'];
$address_country = $_POST['address_country'];
$address_status = $_POST['address_status'];
$notify_version = $_POST['notify_version'];
$verify_sign = $_POST['verify_sign'];
$payer_id = $_POST['payer_id'];
$mc_currency = $_POST['mc_currency'];
$mc_fee = $_POST['mc_fee'];
$password = mt_rand(1000, 9999); 
$p_hash = md5($password);
$username = $_POST['username'];
 //

// Place the transaction into the database
$sql = mysql_query("INSERT INTO transactions (product_id_array, payer_email, first_name, last_name, payment_date, mc_gross, payment_currency, txn_id, receiver_email, payment_type, payment_status, txn_type, payer_status, address_street, address_city, address_state, address_zip, address_country, address_status, notify_version, verify_sign, payer_id, mc_currency, mc_fee, password, ip, username) 
   VALUES('$custom','$payer_email','$first_name','$last_name','$payment_date','$mc_gross','$payment_currency','$txn_id','$receiver_email','$payment_type','$payment_status','$txn_type','$payer_status','$address_street','$address_city','$address_state','$address_zip','$address_country','$address_status','$notify_version','$verify_sign','$payer_id','$mc_currency','$mc_fee','$p_hash','$ip','$username')") or die ("unable to execute the query");
$to      = $payer_email;  
$subject = 'Learn  | Login Credentials';  
$message = ' 

Your officially all ready to go. To login use the information below.

Your account login information 
------------------------- 
Email: '.$payer_email.' 
Password: '.$password.' 
------------------------- 

You can now login at https://www..com/signin.php';  
$headers = 'From:noreply@.com' . "\r\n";  

mail($to, $subject, $message, $headers);  
mysql_close();
// Mail yourself the details
mail(".com", "NORMAL IPN RESULT YAY MONEY!", $req, "From: ");

?>

Answer 1

只是一个猜测:您的 $username 变量似乎是首先根据电子邮件生成的，并通过各种函数运行。

//now to always get unique username
$username = substr($payer_email, 0, strpos($payer_email, '@'));
if ( ! uniqueName($username))
{
    $username = makeUniqueName($username);
}
[...]

但最后你用以下内容覆盖它:

$username = $_POST['username'];

您确定应该发布此字段吗？也许你只需要删除这一行？