Problem with fread()

[rendl42@gmail.com]

Hey all,

I'm a relative newbie to PHP, and am getting some strange results with
the fread() function with PHP (win32) 5.1.2. Here is some code:

<?php
echo $_SERVER['PHP_SELF']."<br>";
echo $_SERVER['DOCUMENT_ROOT'];
$myFile = $_SERVER['DOCUMENT_ROOT']."/Dave/blah.txt";
echo $myfile."<br>";
if (file_exists($m yFile)) {
$fh = fopen($myFile, 'r');
// $theData = fread($fh, filesize($my_fi le));
$theData = fread($fh, 282);
fclose($fh);
echo $theData;
} else {
echo "<br>"." The file";
echo $_SERVER['DOCUMENT_ROOT'];
echo "$myFile does not exist";
}
?>

Now when I run the script using the commented out line for setting
$theData variable, i get a file cannot be 0 bytes message (see error
message at bottom). The file however is not empty. When I replace that
commented line with the line below, I am able to echo $theData
successfuly. I have heard that perhaps there is a bug with fread() in
5.1.x (not sure which rev), but this is causing major pain.

Am I doing something wrong? If this is a bug, is there a simple
alternate I can use?

Thanks heaps!


Warning: fread() [function.fread]: Length parameter must be greater
than 0 in C:\server\wamp\ htdocs\dodger\b lah.php on line 9

[rendl42@gmail.com]

Re: Problem with fread()

Just to add to that. The error message at the bottom says
\dodger\blah.ph p and the top says \Dave\blah.php but in actual fact
this was a manual edit of the error output. Both are set to
\Dave\blah.php in reality.

[rendl42@gmail.com]

Re: Problem with fread()

Fixed it finally. I found using relative path in setting $myFile
variable was breaking it. An absolute path fixed it.

[d]

Re: Problem with fread()

<rendl42@gmail. com> wrote in message
news:1138880313 .657493.280900@ o13g2000cwo.goo glegroups.com.. .[color=blue]
> Hey all,
>
> I'm a relative newbie to PHP, and am getting some strange results with
> the fread() function with PHP (win32) 5.1.2. Here is some code:
>
> <?php
> echo $_SERVER['PHP_SELF']."<br>";
> echo $_SERVER['DOCUMENT_ROOT'];
> $myFile = $_SERVER['DOCUMENT_ROOT']."/Dave/blah.txt";
> echo $myfile."<br>";
> if (file_exists($m yFile)) {
> $fh = fopen($myFile, 'r');
> // $theData = fread($fh, filesize($my_fi le));
> $theData = fread($fh, 282);
> fclose($fh);
> echo $theData;
> } else {
> echo "<br>"." The file";
> echo $_SERVER['DOCUMENT_ROOT'];
> echo "$myFile does not exist";
> }
> ?>
>
> Now when I run the script using the commented out line for setting
> $theData variable, i get a file cannot be 0 bytes message (see error
> message at bottom). The file however is not empty. When I replace that
> commented line with the line below, I am able to echo $theData
> successfuly. I have heard that perhaps there is a bug with fread() in
> 5.1.x (not sure which rev), but this is causing major pain.
>
> Am I doing something wrong? If this is a bug, is there a simple
> alternate I can use?
>
> Thanks heaps!
>
>
> Warning: fread() [function.fread]: Length parameter must be greater
> than 0 in C:\server\wamp\ htdocs\dodger\b lah.php on line 9[/color]

You're inter-changing $myfile, $myFile and $my_file - that might not help
the situation ;)

[Jim Michaels]

Re: Problem with fread()


<rendl42@gmail. com> wrote in message
news:1138880313 .657493.280900@ o13g2000cwo.goo glegroups.com.. .[color=blue]
> Hey all,
>
> I'm a relative newbie to PHP, and am getting some strange results with
> the fread() function with PHP (win32) 5.1.2. Here is some code:
>
> <?php
> echo $_SERVER['PHP_SELF']."<br>";
> echo $_SERVER['DOCUMENT_ROOT'];
> $myFile = $_SERVER['DOCUMENT_ROOT']."/Dave/blah.txt";
> echo $myfile."<br>";[/color]

you might get farther if you concatenate instead of assign. (below) You
will also need to initialize the buffer if you do so. I also suggest using
a slightly larger buffer for performance. between 2K-8K is good, but no more
or you get truncation
..
$theData="";
[color=blue]
> if (file_exists($m yFile)) {
> $fh = fopen($myFile, 'r');
> // $theData = fread($fh, filesize($my_fi le));
> $theData = fread($fh, 282);[/color]

$theData .= fread($fh, 8192);

[color=blue]
> fclose($fh);
> echo $theData;
> } else {
> echo "<br>"." The file";
> echo $_SERVER['DOCUMENT_ROOT'];
> echo "$myFile does not exist";
> }
> ?>
>
> Now when I run the script using the commented out line for setting
> $theData variable, i get a file cannot be 0 bytes message (see error
> message at bottom). The file however is not empty. When I replace that
> commented line with the line below, I am able to echo $theData
> successfuly. I have heard that perhaps there is a bug with fread() in
> 5.1.x (not sure which rev), but this is causing major pain.
>
> Am I doing something wrong? If this is a bug, is there a simple
> alternate I can use?
>
> Thanks heaps!
>
>
> Warning: fread() [function.fread]: Length parameter must be greater
> than 0 in C:\server\wamp\ htdocs\dodger\b lah.php on line 9
>[/color]