paypal IPN验证没有返回‘VERIFIED’或‘INVALID’
<?php
$data_string = 'cmd=_notify-validate';
foreach($_POST as $key => $value){
$value = urlencode(stripslashes($value));
$data_string .= "&$key=$value";
}
$header = "POST /cgi-bin/webscr HTTP/1.0\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen($data_string) . "\r\n\r\n";
$fp = fsockopen ('www.sandbox.paypal.com', 443, $errno, $errstr, 30); // 沙盒用
//$fp = fsockopen ('ssl://www.paypal.com', 443, $errno, $errstr, 30); // 正式用
if (!$fp) {
// HTTP ERROR
} else {
fputs ($fp, $header . $data_string);
while (!feof($fp)) {
$res = fgets ($fp, 1024);
if (strcmp ($res, "VERIFIED") == 0) {
//验证成功
}elseif (strcmp ($res, "INVALID") == 0) {
//验证失败
}
}
fclose ($fp);
}
代码如上,按网上文档应该返回VERIFIED或INVALID,可是现在没有返回值。
求各位大神帮忙!!