Doc #62723 [Nab]: stream_select returns when there is output, not when state changes
Edit report at https://bugs.php.net/bug.php?id=62723&edit=1
ID: 62723
User updated by: thuejk at gmail dot com
Reported by: thuejk at gmail dot com
Summary: stream_select returns when there is output, not when
state changes
Status: Not a bug
Type: Documentation Problem
Package: Streams related
Operating System: Linux
PHP Version: 5.3.15
Block user comment: N
Private report: N
New Comment:
I have the impression that you did not read my bug report. Your reply does not
make sense to me. I do say that the current behavior is expected. What I also say
is that the documentation disagrees.
This bug should be reopened.
Previous Comments:
------------------------------------------------------------------------
[2012-11-15 12:11:24] krakjoe@php.net
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php
This is expected, you are not working with sockets but streams, it is correct that
a stream should consider it's buffers to be indicative of state.
------------------------------------------------------------------------
[2012-08-02 09:23:00] thuejk at gmail dot com
Description:
------------
The documentation for stream_select() says (
http://www.php.net/manual/en/function.stream-select.php
)
"The stream_select() function accepts arrays of streams and waits for them to
change status."
But that is not true. stream_select will return immediately if the read buffer of
a stream is non-empty. The read buffer does not have to change status or length
for stream_select() to return.
Obviously the current behaviour of stream_select() is correct, and the
documentation is wrong. The current behaviour is also how select() (which the
documentation says stream_select behaves like) works.
Test script:
---------------
<?php
function my_passthru2() {
$cmd = sprintf("echo a;sleep 100000");
$stream = popen($cmd, "r");
$stream_array = Array($stream);
$dummy_array = null;
sleep(1);
echo "after sleep";
stream_select($stream_array, $dummy_array, $dummy_array, 10);
echo "after select!";
}
my_passthru2();
?>
Expected result:
----------------
Following the documentation: "after select!" should be printed 10 seconds after
"after sleep", since the stream does not change status after stream_select is
called (the read buffer will always contain "a").
Actual result:
--------------
"after select!" is printed immediately after "after sleep".
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=62723&edit=1
Thread (3 messages)