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Posted by Chung Leong on 12/10/05 19:51
In theory, you can create a stream context, then attach a callback
function to it to receive notifications:
$context = stream_context_create(array());
stream_context_set_params($context, array('notification' =>
'stream_callback'));
$f = fopen("http://www.google.com/", "rb", false, $context);
The parameters passed to the function are as followed:
function stream_callback(
$notifycode,
$severity,
$xmsg,
$xcode,
$bytes_sofar,
$bytes_max)
Notification codes are defined as such:
1 = RESOLVE
2 = CONNECT
3 = AUTH_REQUIRED
4 = MIME_TYPE_IS
5 = FILE_SIZE_IS
6 = REDIRECTED
7 = PROGRESS
8 = COMPLETED
9 = FAILURE
10 = AUTH_RESULT
Severity codes:
0 = INFO
1 = WARNING
2 = ERROR
In practice, however, the PHP stream API is somewhat of a
work-in-progress. Not everything is listed above is actually
implemented. As of PHP 4.3.6, the callback doesn't receive
notifications for the resolve stage.
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