file locking

I am new to php and am on chapter 2 PHP and MySQL by Welling and Thomson.

When executing the code from the example to write the output data string:

// open file for appending
@ $fp = fopen("../../orders/orders.txt", "a");

flock($fp, 2);

if (!$fp)
{
echo "<p><strong> Your order could not be processed at this time. "
."Please try again later.</strong></p></body></html>";
exit;
}

fwrite($fp, $outputstring);
flock($fp, 3); //line 56
fclose($fp);

The processorder.php page opens and the screen output is ok. Then I get the
following message below the order echos:

Warning: flock(): supplied argument is not a valid stream resource in
c:\inetpub\wwwroot\phptest\PROCESSORDER.PHP on line 56

Any advice of where I might find information on why I get this message will
be appreciated.

Bert

re: file locking

Sorry, the error occured on the first call to flock as indicated below.


"Bert" <bert_remove@meckcom.net> wrote in message
news:C417c.10157$_Q5.2458@fe07.usenetserver.com...[color=blue]
> I am new to php and am on chapter 2 PHP and MySQL by Welling and Thomson.
>
> When executing the code from the example to write the output data string:
>
> // open file for appending
> @ $fp = fopen("../../orders/orders.txt", "a");
>
> flock($fp, 2);
>
> if (!$fp) //line 56
> {
> echo "<p><strong> Your order could not be processed at this time. "
> ."Please try again later.</strong></p></body></html>";
> exit;
> }
>
> fwrite($fp, $outputstring);
> flock($fp, 3);
> fclose($fp);
>
> The processorder.php page opens and the screen output is ok. Then I get[/color]
the[color=blue]
> following message below the order echos:
>
> Warning: flock(): supplied argument is not a valid stream resource in
> c:\inetpub\wwwroot\phptest\PROCESSORDER.PHP on line 56
>
> Any advice of where I might find information on why I get this message[/color]
will[color=blue]
> be appreciated.
>
> Bert
>
>
>
>
>
>[/color]

re: file locking

"Bert" <bert_remove@meckcom.net> wrote in message
news:C417c.10157$_Q5.2458@fe07.usenetserver.com...[color=blue]
> I am new to php and am on chapter 2 PHP and MySQL by Welling and Thomson.
>
> When executing the code from the example to write the output data string:
>
> // open file for appending
> @ $fp = fopen("../../orders/orders.txt", "a");
>
> flock($fp, 2);
>
> if (!$fp)
> {
> echo "<p><strong> Your order could not be processed at this time. "
> ."Please try again later.</strong></p></body></html>";
> exit;
> }
>
> fwrite($fp, $outputstring);
> flock($fp, 3); //line 56
> fclose($fp);
>
> The processorder.php page opens and the screen output is ok. Then I get[/color]
the[color=blue]
> following message below the order echos:
>
> Warning: flock(): supplied argument is not a valid stream resource in
> c:\inetpub\wwwroot\phptest\PROCESSORDER.PHP on line 56
>
> Any advice of where I might find information on why I get this message[/color]
will[color=blue]
> be appreciated.
>
> Bert
>[/color]

That error means the file couldn't be opened.

Put that flock() after your if(!$fp) block, and you will probably see your
custom error message.

re: file locking

"jn" <usenet*spamistehsuckremovetoreply*@jasonnorris.ne t> wrote in message
news:R%27c.313385$Po1.133999@twister.tampabay.rr.c om...[color=blue]
> "Bert" <bert_remove@meckcom.net> wrote in message
> news:C417c.10157$_Q5.2458@fe07.usenetserver.com...[color=green]
> > I am new to php and am on chapter 2 PHP and MySQL by Welling and[/color][/color]
Thomson.[color=blue][color=green]
> >[/color]
>
> When executing the code from the example to write the output data string:
>
> // open file for appending
> @ $fp = fopen("../../orders/orders.txt", "a");[/color]
<snip>[color=blue][color=green]
> > The processorder.php page opens and the screen output is ok. Then I get[/color]
> the[color=green]
> > following message below the order echos:
> >
> > Warning: flock(): supplied argument is not a valid stream resource in
> > c:\inetpub\wwwroot\phptest\PROCESSORDER.PHP on line 56
> >
> > Any advice of where I might find information on why I get this message[/color]
> will[color=green]
> > be appreciated.
> >
> > Bert
> >[/color]
>
> That error means the file couldn't be opened.
>
> Put that flock() after your if(!$fp) block, and you will probably see your
> custom error message.
>
>[/color]

You're using a relative path, so you might like to check where you are - you
might be surprised. Also check file/directory permissions - your web server
account needs to be able to access the file.

Garp