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[2009-10-03 12:42 UTC] chmod3 at googlemail dot com
Description:
------------
According to documentation:
"Note: socket_read() returns a zero length string ("") when there is no more data to read."
This does not seem to be the case on my installations:
PHP 5.3.0 WinVista
PHP 5.2.11 WinVista
PHP 5.2.11 FreeBSD
PHP 5.2.10 WinVista
PHP 5.2.9 WinVista
socket_read() just hangs.
Reproduce code:
---------------
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$connection = socket_connect($socket, 'news.giganews.com', 119);
$response = '';
do {
$recv = '';
echo "START READ\n";
$recv = socket_read($socket, 512);
echo "END READ\n";
var_dump($recv);
if($recv != '') {
$response .= $recv;
}
} while($recv != '');
echo 'OUTPUT: ' . $reply;
Expected result:
----------------
START READ
END READ
string(23) "200 News.GigaNews.Com
"
START READ
END READ
OUTPUT: 200 News.GigaNews.Com
Actual result:
--------------
START READ
END READ
string(23) "200 News.GigaNews.Com
"
START READ
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Last updated: Sun Jul 06 20:01:35 2025 UTC |
I think your example code makes no sense. When I change it a bit, it works as expected (Did you check PHP_BINARY READ vs. PHP_NORMAL_READ?) <?php $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); $connection = socket_connect($socket, 'news.giganews.com', 119); do { $recv = ''; echo "//START READ\n"; $recv = socket_read($socket, 1 ); var_dump($recv); echo "\\\\END READ\n\n"; } while($recv != '' && $recv !== false && $recv != "\n"); echo 'OUTPUT'; ?> I do agree that the docs could be clarified.Yes your code works only if PHP_NORMAL_READ is added. Adding PHP_BINARY_READ or ommiting either will make it hang. I was hoping to use binary so my script will handle the /r/n CODE ---- $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); $connection = socket_connect($socket, 'news.giganews.com', 119); do { echo "-- START READ\n"; $recv = socket_read($socket, 512, PHP_NORMAL_READ); var_dump($recv); echo "-- END READ\n"; } while ($recv !== '' && $recv !== FALSE && $recv !== "\n");