我想从这个话题开始，说我发现的所有可能的解决方案都没有为我解决。所以我希望有人可以帮助我。
这是我用于PayPal IPN（类文件）的代码。
<?php
require('../inc/db.php');
define('LOG_FILE', 'ipn_results.log');
define('SSL_P_URL', 'https://www.paypal.com/cgi-bin/webscr');
define('SSL_SAND_URL','https://www.sandbox.paypal.com/cgi-bin/webscr');
class paypal_class {
var $last_error; // holds the last error encountered
var $ipn_log; // bool: log IPN results to text file?
var $ipn_log_file; // filename of the IPN log
var $ipn_response; // holds the IPN response from paypal
var $ipn_data = array(); // array contains the POST values for IPN
var $fields = array(); // array holds the fields to submit to paypal
function paypal_class() {
// initialization constructor. Called when class is created.
$this->paypal_url = 'https://www.paypal.com/cgi-bin/webscr';
$this->last_error = '';
$this->ipn_log_file = '/ipn_results.log';
$this->ipn_log = true;
$this->ipn_response = '';
// populate $fields array with a few default values. See the paypal
// documentation for a list of fields and their data types. These defaul
// values can be overwritten by the calling script.
$this->add_field('rm','2'); // Return method = POST
$this->add_field('cmd','_xclick');
}
function add_field($field, $value) {
$this->fields["$field"] = $value;
}
function submit_paypal_post() {
echo "<html>\n";
echo "<head><title>Processing Payment...</title>";
echo "<body onLoad=\"document.forms['paypal_form'].submit();\">\n";
echo "<center><h2>Please wait, your order is being processed and you";
echo " will be redirected to the paypal website.</h2></center>\n";
echo "<form method=\"post\" name=\"paypal_form\" ";
echo "action=\"".$this->paypal_url."\">\n";
foreach ($this->fields as $name => $value)
{
echo "<input type=\"hidden\" name=\"$name\" value=\"$value\"/>\n";
}
echo "<center><br/><br/>If you are not automatically redirected to ";
echo "paypal within 5 seconds...<br/><br/>\n";
echo "<input type=\"submit\" value=\"Click Here\"></center>\n";
echo "</body></html>\n";
}
function validate_ipn() {
mysqli_query($db, "UPDATE matches SET status = 3");
// parse the paypal URL
$url_parsed=parse_url($this->paypal_url);
// read post data from PayPal and add 'cmd'
$req = 'cmd=_notify-validate';
if(function_exists('get_magic_quotes_gpc')) {
$get_magic_quotes_exists = true;
}
foreach ($myPost as $key => $value) {
if($get_magic_quotes_exists == true && get_magic_quotes_gpc() == 1) {
$value = urlencode(stripslashes($value));
} else {
$value = urlencode($value);
}
$req .= "&$key=$value";
}
// open the connection to paypal
$fp = fsockopen ('ssl://www.paypal.com', 443, $errno, $errstr, 30);
if(!$fp) {
// could not open the connection. If loggin is on, the error message
// will be in the log.
$this->last_error = "fsockopen error no. $errnum: $errstr";
$this->log_ipn_results(false);
mysqli_query($db, "UPDATE matches SET status = 5");
return false;
} else {
// Post the data back to paypal
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, $post_string . "\r\n\r\n");
// loop through the response from the server and append to variable
while(!feof($fp)) {
$this->ipn_response .= fgets($fp, 1024);
}
fclose($fp); // close connection
mysqli_query($db, "UPDATE matches SET status = 8");
}
if (eregi("VERIFIED",$this->ipn_response)) {
// Valid IPN transaction.
$this->log_ipn_results(true);
mysqli_query($db, "UPDATE matches SET status = 9");
return true;
} else {
// Invalid IPN transaction. Check the log for details.
$this->last_error = 'IPN Validation Failed.';
$this->log_ipn_results(false);
mysqli_query($db, "UPDATE matches SET status = 6");
return false;
}
}
function log_ipn_results($success) {
if (!$this->ipn_log) return; // is logging turned off?
// Timestamp
$text = '['.date('m/d/Y g:i A').'] - ';
// Success or failure being logged?
if ($success) $text .= "SUCCESS!\n";
else $text .= 'FAIL: '.$this->last_error."\n";
// Log the POST variables
$text .= "IPN POST Vars from Paypal:\n";
foreach ($this->ipn_data as $key=>$value) {
$text .= "$key=$value, ";
}
// Log the response from the paypal server
$text .= "\nIPN Response from Paypal Server:\n ".$this->ipn_response;
// Write to log
$fp=fopen($this->ipn_log_file,'a');
fwrite($fp, $text . "\n\n");
fclose($fp); // close file
}
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($value)." </td></tr>";
}
echo "</table><br>";
}
}
您找到的查询实际上不是代码的一部分。我使用它们进行故障排除，因此我可以看到问题出在哪里，但是由于某种原因它们没有被执行。它也不会记录日志，它应该登录文件 ipn_results.log ，但是它不是，我不知道路径是否有问题，或者我应该给我文件夹某些权限。但是。
此代码正在与另一个文件一起使用，我将在此处添加代码。
<?php
include_once('../inc/db.php');
require ('../inc/steamauth.php');
function filter($var)
{
return stripslashes(htmlspecialchars($var));
}
require_once('paypal.class.php'); // include the class file
$p = new paypal_class;
$p->paypal_url = 'https://www.paypal.com/cgi-bin/webscr';
$this_script = 'https://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'];
if (empty($_GET['action'])) $_GET['action'] = 'process';
switch ($_GET['action']) {
case 'process':
$teamid = mysqli_real_escape_string($db, $_POST['teamid']);
$type = mysqli_real_escape_string($db, $_POST['type']);
switch($type) {
case 'me':
$cost = '0.01';
break;
case 'team':
$cost = '0.01';
break;
}
$p->add_field('business', 'MY EMAIL');
$p->add_field('return', 'https://'.$_SERVER['HTTP_HOST']); //The success URL
$p->add_field('custom', $teamid);
$p->add_field('cancel_return', 'http://'.$_SERVER['HTTP_HOST']); // The "canceled" URL
$p->add_field('notify_url', $this_script.'?action=ipn'); //The IPN URL, the URL pointing to THIS page.
$p->add_field('item_number', filter($_POST['type']));
$p->add_field('item_name', $_POST['type'] . '');
$p->add_field('amount', $cost); // How ever much the VIP cost.
$p->submit_paypal_post();
break;
case 'ipn':
$db = mysqli_connect("localhost", "root", "*****", "***");
$problem = mysqli_query($db, "UPDATE matches SET status = '1'");
if ($p->validate_ipn()) {
$complete = mysqli_query($db, "UPDATE matches SET status = '2'");
}
break;
}
?>
如您所见，如果IPN已验证，它将运行查询 $ complete ，但没有，它将运行查询 $ problem 表示它已连接到正确的PayPal，并且IPN网址正确。
我以前一直在使用此确切的代码，但是无论如何它都无法正常工作。 我正在使用 Windows 2016 VPS 在 IIS 10
上运行防火墙已禁用。 我的网站正在运行 SSL证书 我正在使用 PHP 5.3.8 ，但是我尝试使用 PHP 7.2.7 。
我不知道我提供的任何信息是否会导致代码出现问题。我还要提及的是，贝宝（PayPal）帐户是新帐户，并且是个人帐户。除了我需要更改的IPN设置，我不知道是否还有其他设置。
代码可以工作多长时间？ 该代码运行良好，首先我要运行以html格式连接到我的paypal文件的表单（在本例中为paypal.php）。它会检查我选择哪种产品（$ type），然后以正确的价格将我重定向到PayPal，并将付款转到正确的帐户。付款完成后，它会将我重定向回网站，但由于我要查询$ complete 才能运行，因此需要验证IPN。不会发生。
我认为这就是代码执行的内容。
// Invalid IPN transaction. Check the log for details.
$this->last_error = 'IPN Validation Failed.';
$this->log_ipn_results(false);
mysqli_query($db, "UPDATE matches SET status = 6");
return false;
有人知道可能是什么原因吗？如前所述，我以前使用过此代码，并且可以正常工作，但现在却不行。