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Jul 28th, 2008

Allowing one user at a time to access a particular PHP Page

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Dear Forum,

Thanks for taking time reading this post.

I checked out on sessions and cookies but I guess they are more towards the client side?

Is there a way to achieve this:

The PHP program I am doing is to reverse Telnet (Terminal Server and it accessing through CONSOLE port) into a router from a selection of a dropdown list box. Once this user had successfully logged into the router, other users(different computer) will NOT be able to even see this same logged on router as a selection to log in again.

I hope you can understand my question.

Thanks alot people!

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Jul 29th, 2008

Re: Allowing one user at a time to access a particular PHP Page

Well, if you put your routers into a mysql table, then once selected you could flag a column (as being in use).

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Jul 29th, 2008

Re: Allowing one user at a time to access a particular PHP Page

One solution could be:

create a temp file called lock.txt.
The file will be created only after a successful login. The file will be deleted after logout.
Before login you check if the file exists and if it does the script stops.

Note:
if for some reason the temp file cannot be deleted. It is a good idea before login to check for last modification time if it is more than 24hours delete the file.

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Aug 6th, 2008

Re: Allowing one user at a time to access a particular PHP Page

I will try that... thanks so much, even for replying!

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Aug 7th, 2008

Re: Allowing one user at a time to access a particular PHP Page

Hi,

I tried with the lock.txt. It worked pretty well.

But do you know the coding to check if a file exist or not? I am very new to PHP. Thanks!

Dav

Click to Expand / Collapse Quote originally posted by lordspace ...

One solution could be:

create a temp file called lock.txt.
The file will be created only after a successful login. The file will be deleted after logout.
Before login you check if the file exists and if it does the script stops.

Note:
if for some reason the temp file cannot be deleted. It is a good idea before login to check for last modification time if it is more than 24hours delete the file.

LiBOC

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Aug 7th, 2008

Re: Allowing one user at a time to access a particular PHP Page

use file_exists function

php Syntax (Toggle Plain Text)
 
$filename = '/path/to/foo.txt';
 
if (file_exists($filename)) {
    echo "The file $filename exists";
} else {
    echo "The file $filename does not exist";
}
$filename = '/path/to/foo.txt';

if (file_exists($filename)) {
    echo "The file $filename exists";
} else {
    echo "The file $filename does not exist";
}

ryan_vietnow

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Aug 7th, 2008

Re: Allowing one user at a time to access a particular PHP Page

Oh Hi,

Sorry. I done that detection of existing file already. Thanks,

Click to Expand / Collapse Quote originally posted by lordspace ...

One solution could be:

create a temp file called lock.txt.
The file will be created only after a successful login. The file will be deleted after logout.
Before login you check if the file exists and if it does the script stops.

Note:
if for some reason the temp file cannot be deleted. It is a good idea before login to check for last modification time if it is more than 24hours delete the file.

LiBOC

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Aug 7th, 2008

Re: Allowing one user at a time to access a particular PHP Page

Hey hi!

Thanks for replying. Do you know how to pop u an alert window message in PHP?
Thanks,

Dav

Click to Expand / Collapse Quote originally posted by ryan_vietnow ...

use file_exists function
php Syntax (Toggle Plain Text)
 
$filename = '/path/to/foo.txt';
 
if (file_exists($filename)) {
    echo "The file $filename exists";
} else {
    echo "The file $filename does not exist";
}
$filename = '/path/to/foo.txt'; if (file_exists($filename)) { echo "The file $filename exists"; } else { echo "The file $filename does not exist"; }

LiBOC

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Aug 7th, 2008

Re: Allowing one user at a time to access a particular PHP Page

I think that's not possible,Use javascript instead for popup boxes

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Aug 7th, 2008

Re: Allowing one user at a time to access a particular PHP Page

something like:

php Syntax (Toggle Plain Text)
echo '<script type="text/javascript">
            alert("hello");
         </script>';
echo '<script type="text/javascript">
            alert("hello");
         </script>';

but this is not recommended..

Last edited by ryan_vietnow; Aug 7th, 2008 at 2:42 am.

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