read/write with popen in php

luftwaffe · 12-28-2014, 12:37 PM

There are two pieces of code:

Code:

$handle = popen('php x.php', 'w');
$write = fwrite($handle, "abc\r\n");
echo $write;
sleep(10);
pclose($handle);

$write shows me that all 5 characters are written. The problem is that those are never received in the other (x.php) file:

Code:

do {
    $c = fgets(STDIN);
    print($c);
} while (!feof(STDIN));

sleep(10);

I would like to see at least an 'a' character printed by the second script but it does not show anything. Any clue why and how to get this working?

NevemTeve · 12-28-2014, 01:33 PM

1. try fflush
2. try strace -f php outer.php

luftwaffe · 12-28-2014, 02:51 PM

Thank you for the quick reply.
1. I added fflush($handle); after the fwrite($handle, "abc\r\n); but unfortunately it does not help.
2. There is no strace as I run on windows (PHP 5.6.4 (cli) (built: Dec 17 2014 13:21:16)). - Yeah, I understand this is linux forum.

Still, this should work the same, should not?

luftwaffe · 12-28-2014, 03:05 PM

OMG...

Now I am really clueless.
I loaded a CentOS 6 and ran the same code. Actually it works there. It just seems to be not working on Windows. Hmm...

luftwaffe · 12-28-2014, 03:24 PM

https://bugs.php.net/bug.php?id=68668