Edward Vermillion wrote:
On Jun 18, 2007, at 3:30 PM, Myron Turner wrote:
I've written a plugin for DokuWiki which uses the following DokuWiki
function for reading files:
function io_readFile($file,$clean=true){
$ret = '';
if(@file_exists($file)){
if(substr($file,-3) == '.gz'){
$ret = join('',gzfile($file));
}else if(substr($file,-4) == '.bz2'){
$ret = bzfile($file);
}else{
$ret = join('',file($file));
}
}
if($clean){
return cleanText($ret);
}else{
return $ret;
}
}
On Linux machines, this seems to behave as you would hope, that is,
if the file doesn't exist then you get back a null string. In any
event, none of the users who have installed it on Linux machines have
had a problem with it. And I have done several installs myself. But
one user installed the plugin on a Windows machine and the code fell
through to $ret = join('',file($file)) even though there was no
$file. The result was an error message:
Permission denied in *E:\Program Files\EasyPHP
2.0b1\www\dokuwiki\inc\io.php* on line *97
*Line 97 is the join. So the function is attempting to read a
non-existent file.
I was just wondering whether there is some difference in the way his
PHP version handles the @ operator in:
if(@file_exists($file))
That is, is it possible that by suppressing errors, this expression
somehow returns true? And is it a bug?
Are you sure the file doesn't exist? Could it just be that it exists,
but the permissions are not set correctly?
Ed
I don't really know, since I am depending on the user's feed-back. But
apparently he hadn't done anything yet with the plugin, so no files
would have been in that directory. But it's a possibility since the code
doesn't check for whether the file is readable.
It could just be a Windows issue, but I thought I'd check here, because
if it's something that others have run into and which I can rectify I'd
want to do it.
--
_____________________
Myron Turner
http://www.room535.org
http://www.bstatzero.org
http://www.mturner.org/XML_PullParser/
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