Opened file conflict ??

[xserban]

I have a problem. I am making a site and i need to store text information in some files. But if I am accessing the site, the php script will open the file for reading. If in the same moment (right in the same moment) another user will access the site, when the php script will try to open the file for reading (that is already opened) it will generate a conflict, or is it possible to open a file for reading if it was already opened for reading ?
The server runs on Linux with apache.

Thanks.

[Anon]

Are you using flock() ?

When uyou open a file for reading use flock(1). That is a shared lock and will allow another stream to read from the file while being read feom another stream. When you write to a file, use flock(2). That locks the file so that it canot be read or written to while a script is writing to the file. In both cases, when you are done use flock(3) to release the lock.

This should not give you a conflict. The script should wait until the flock is released, then access the file.

[xserban]

All I want is to make a php page that will open a file (news.txt) for reading and while the file is opened, other users from Internet to be able to read the file by accessing the same php page.

$filename="news.txt";
$fd = fopen ($filename, "r") or die ("Can't open file\n");
while (!feof($fd))
{
$bufdata = fgets($fd, 4096);
$bufstire = fgets($fd, 4096);
print $bufdata;
print "<hr>";
print $bufstire;
}

#fclose ($fd);

Is thes correct or i should use flock ?
Where should i use flock ?

I would appreciate any answer.