ID: 34429
User updated by: zimage at icdsoft dot com
Reported By: zimage at icdsoft dot com
Status: Open
Bug Type: CGI related
Operating System: *
PHP Version: 5CVS, 4CVS (2005-09-12)
New Comment:
It could be also used for writing progress bars. On a random shared
hosting server:
locate .php |wc -l
25147
locate .php |xargs -n1 -i grep -H -e "flush *(" {}
641
So people are using it for some reason... I can see flush() used in
Moveable Type, Word Press, MediaWiki and so on.
Previous Comments:
------------------------------------------------------------------------
[2005-09-12 15:49:27] [EMAIL PROTECTED]
Writing such things using PHP is pretty useless IMO, but if it works
with other SAPIs..
------------------------------------------------------------------------
[2005-09-12 15:47:25] zimage at icdsoft dot com
This is how you could write a chat client for example. Connection is
kept open for the duration of chat session and php script is looping
over the client and server messages.
------------------------------------------------------------------------
[2005-09-10 22:56:11] [EMAIL PROTECTED]
How would it be useful to be able to turn it off?
------------------------------------------------------------------------
[2005-09-09 11:25:26] zimage at icdsoft dot com
And strace of php process looks like:
read(4, "<?php\n\tfor ($i=0; $i<4; $i++){\n\t"..., 8192) = 65
read(4, "", 4096) = 0
read(4, "", 8192) = 0
close(4) = 0
munmap(0x4056b000, 4096) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGCHLD, NULL, {SIG_DFL}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
nanosleep({1, 0}, {1, 0}) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGCHLD, NULL, {SIG_DFL}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
nanosleep({1, 0}, {1, 0}) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGCHLD, NULL, {SIG_DFL}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
nanosleep({1, 0}, {1, 0}) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGCHLD, NULL, {SIG_DFL}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
nanosleep({1, 0}, {1, 0}) = 0
setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={0, 0}}, NULL) =
0
write(3, "[EMAIL PROTECTED]: text/html\r"..., 96) = 96
I.e. there are 4 calls to sleep and the script output is writen at
once. Any
pointers to documentation or further tests that I should perform are
welcome.
------------------------------------------------------------------------
[2005-09-08 21:23:38] zimage at icdsoft dot com
Just tried with php5-200509081630:
PHP 5.1.0-dev (cgi-fcgi) (built: Sep 8 2005 15:09:53)
No luck either. Output still comes at once.
Tried with apache2 + php-4.3.11 - the problem is present there too.
------------------------------------------------------------------------
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/34429
--
Edit this bug report at http://bugs.php.net/?id=34429&edit=1
