PDT returning 423 as first line before success?

问题

I'm trying to get PDT working in the sandbox, and have just run afoul of the problem of using HTTP 1.1 as described here:

https://stackoverflow.com/a/14701946/391615

Having changed everything, when I create my connection to

$fp = fsockopen ('ssl://www.sandbox.paypal.com', 443, $errno, $errstr, 30);
fputs ($fp, $header . $req);

// read the body data 
$res = '';
while (!feof($fp)) 
{
    $line = fgets ($fp, 1024);
    // etc...

I find that the very first lines return look like this:

423
SUCCESS
mc_gross=240.00
invoice=PP0000
protection_eligibility=Partially+Eligible+-+INR+Only
address_status=unconfirmed

Any idea what the 423 is all about?

回答1:

Well here we go: PHP fsockopen() / fread() returns messed up data

Looks like it's chunked data being returned from the server

来源：https://stackoverflow.com/questions/16563516/pdt-returning-423-as-first-line-before-success