php-general Digest 25 Sep 2006 17:01:38 -0000 Issue 4367
php-general Digest 25 Sep 2006 17:01:38 - Issue 4367
Topics (messages 242181 through 242198):
Re: Alternative to FCKeditor
242181 by: Lester Caine
242183 by: Kae Verens
Re: Download files outside DocumentRoot Dir
242182 by: Kae Verens
242188 by: Miles Thompson
242195 by: Christopher Weldon
Re: Error Reporting for file commands
242184 by: James Nunnerley
242197 by: Robert Cummings
Print or Echo takes lots of time
242185 by: Sancar Saran
242187 by: Colin Guthrie
Re: array_sum($result)=100
242186 by: Ahmad Al-Twaijiry
242194 by: Robin Vickery
242196 by: Martin Alterisio
242198 by: Robert Cummings
Re: Frustrated trying to get help from your site
242189 by: Michelle Konzack
242191 by: Ray Hauge
242192 by: David Robley
How would you do this ?
242190 by: Jad madi
Re: File Upload Security and chmod
242193 by: tedd
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---BeginMessage---
Jon Anderson wrote:
John Taylor-Johnston wrote:
Anyone know of a good alternative to FCKeditor? Or a decent file
uploader?
Even after paying for a little help, I get zip for FCK.
I need another solution, another editor with an active forum or support,
John
TinyMCE...I don't know how good/bad TinyMCE is, but if you can't use
FCK, you could try it.
http://tinymce.moxiecode.com/
Looks like we are all looking for something that actually works :(
I switched TinyMCE off because it keeps messing up good html, and I've
been told to try FCKeditor ;)
Currently I seem to be stuck with using composer locally and dumping the
results back to the site :(
--
Lester Caine - G8HFL
-
L.S.Caine Electronic Services - http://home.lsces.co.uk
Model Engineers Digital Workshop -
http://home.lsces.co.uk/ModelEngineersDigitalWorkshop/
Treasurer - Firebird Foundation Inc. - http://www.firebirdsql.org/index.php
---End Message---
---BeginMessage---
John Taylor-Johnston wrote:
Anyone know of a good alternative to FCKeditor? Or a decent file uploader?
Even after paying for a little help, I get zip for FCK.
I need another solution, another editor with an active forum or support,
John
try my KFM addon for FCKeditor (http://kfm.verens.com/)
use the stable release for now, as the nightly release is being converted to
use SQLite at the moment.
Kae
---End Message---
---BeginMessage---
Ramiro wrote:
Hi,
i'm trying to find a good solution to this problem. I want download files
from a directory outside DocumentRoot.
This files cannot be downloaded through direct url like
http://site/test.zip. It must be downloaded after user login.
I know i can do that using some functions like fread() + fopen() or
readfile(), than i would echo file buffer to browser with correct headers.
But, reading then dumping file to browser is a big problem to server.
http://ie2.php.net/fpassthru
Kae
---End Message---
---BeginMessage---
At 01:44 AM 9/25/2006, Ramiro wrote:
Hi,
i'm trying to find a good solution to this problem. I want download files
from a directory outside DocumentRoot.
This files cannot be downloaded through direct url like
http://site/test.zip. It must be downloaded after user login.
I know i can do that using some functions like fread() + fopen() or
readfile(), than i would echo file buffer to browser with correct headers.
But, reading then dumping file to browser is a big problem to server.
I've made one test that shows me i will eat 1.8% of RAM (i've used ps
aux at Linux, in a server with 2Gb of RAM) to download a 30Mb file at
60kb/s speed. So, imagine what a dump-php-script can do with 50 to 100
concurrently downloads. Probably i will need 1 TeraByte of RAM to provide
downloads ;)
Theres my question now. Is there other way to protect files against direct
downloading? (Obligating users to login and denying direct-url's).
I also know i can check referer by using Mod_Rewrite at Apache. But it isn't
secure, since referer cannot be sent or be fake.
Please, help me ;)
Thank you !
Script i used to test:
?
$url = test.tar.gz;
header('Content-Description: File Transfer');
header('Content-Type: application/force-download');
header(Content-Disposition: attachment; filename=\.basename($url).\;);
header('Content-Length: ' . filesize($url));
@readfile($url) OR die();
?
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To unsubscribe, visit: http://www.php.net/unsub.php
This is the contents of a script used to fetch .swf's. The script is called
from a Flash movie.
$filenam = $_REQUEST[filenam];
if ($filenam){
$contents = file_get_contents( ../above_root/ . $filenam );
Re: [PHP] Alternative to FCKeditor
Jon Anderson wrote: John Taylor-Johnston wrote: Anyone know of a good alternative to FCKeditor? Or a decent file uploader? Even after paying for a little help, I get zip for FCK. I need another solution, another editor with an active forum or support, John TinyMCE...I don't know how good/bad TinyMCE is, but if you can't use FCK, you could try it. http://tinymce.moxiecode.com/ Looks like we are all looking for something that actually works :( I switched TinyMCE off because it keeps messing up good html, and I've been told to try FCKeditor ;) Currently I seem to be stuck with using composer locally and dumping the results back to the site :( -- Lester Caine - G8HFL - L.S.Caine Electronic Services - http://home.lsces.co.uk Model Engineers Digital Workshop - http://home.lsces.co.uk/ModelEngineersDigitalWorkshop/ Treasurer - Firebird Foundation Inc. - http://www.firebirdsql.org/index.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: Download files outside DocumentRoot Dir
Ramiro wrote: Hi, i'm trying to find a good solution to this problem. I want download files from a directory outside DocumentRoot. This files cannot be downloaded through direct url like http://site/test.zip. It must be downloaded after user login. I know i can do that using some functions like fread() + fopen() or readfile(), than i would echo file buffer to browser with correct headers. But, reading then dumping file to browser is a big problem to server. http://ie2.php.net/fpassthru Kae -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: Alternative to FCKeditor
John Taylor-Johnston wrote: Anyone know of a good alternative to FCKeditor? Or a decent file uploader? Even after paying for a little help, I get zip for FCK. I need another solution, another editor with an active forum or support, John try my KFM addon for FCKeditor (http://kfm.verens.com/) use the stable release for now, as the nightly release is being converted to use SQLite at the moment. Kae -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] RE: Error Reporting for file commands
Sometime ago, I posted the email below, regarding some problems with a file manager we have developed for our users. The problem still exists, and is now starting to cause complaints. Mainly from my manager, who's fed-up with receiving the error emails from the system, but it must be annoying users! The scenario is; we have a fairly large Linux cluster, with a RAID disc. Obviously because of the number of disc calls, there's a fair amount of caching. We think the problem is related to this, and would ideally like purely to suppress the error, as it's normally when the script is trying to delete something already deleted. I've tried turning off errors (error_reporting(0)) and indeed using @ on all php file system calls, but it still triggers an error. Does anyone know of any issues with suppressing errors on the following functions? - unlink - mkdir - copy - scandir All of these fail sporadically, even with the above error stuff turned off, and trigger an error. Anyone's thoughts gratefully received Thanks Nunners -Original Message- From: James Nunnerley [mailto:[EMAIL PROTECTED] Sent: 25 July 2006 16:33 To: 'php-general@lists.php.net' Subject: Error Reporting for file commands We've created a file manager which allows users to access their web space on a server. It's working brilliantly, except that it would seem there are some caching issues, either by the system cache or the web server cache that are causing us a headache. When the script tries to delete a file, we always check (using file_exists) to see whether the file exists before it's deleted. The check comes back true, but the unlink then fails, saying no file or directory there! We've tried turning off all errors (using error_reoprting(0) ) but this would seem to have little difference in the error - it still comes back with a failure. We are using our own error handling, but before the command is carried out, there is this 0 call... Does anyone know how we can stop these errors? Cheers Nunners -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Print or Echo takes lots of time
Hi, When I was check the performance of my system I found interesting resuts. My code stores html output into a variable. When page creation complete I printed out the variable. Problem was generation html code takes 0.5 second and just echo $strPage takes 2.0 or more second. my code structure was. $strPage = html yada dayda; ... $strPage.= another html tags; ... $strPage.= getSqlDataAndCreateSomeHtmlCOde(); ... end of page creation. Current Total execution time 0.5 seconds. print $strPage; Current Total execution time 2.5 seconds. $strPage carries entire html structure (for example equal of 100K html code); excluding the cookie and other kind of header transfers and error messages, there was no print or echo command was submitted. Is there any idea about this latency and any idea to find problem... Regards Sancar Saran -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] array_sum($result)=100
Hi, This seems to be nice method, I tried to do translate it to PHP put since I'm bad in English I couldn't :) could you give me some prototype for the method. On 9/25/06, Google Kreme [EMAIL PROTECTED] wrote: On 24 Sep 2006, at 10:41 , Penthexquadium wrote: On Sun, 24 Sep 2006 19:06:11 +0300, Ahmad Al-Twaijiry [EMAIL PROTECTED] wrote: I have array of numbers and I want to get out of it a list of numbers that if I sum them it will be 100, here is my list (for example ) : I think you can try to sort the array in reverse order, and then calculate the sum of numbers in loops (end loop when the sum is larger than target sum). That seems like a very slow way to do it, I think. First thing, sort the array, then scan the array backwards for the first number under the target sum (in this case, 50). Then look for another number that will add to make the target sum. So, if you find a 90, look for a 10. If you find it, you're done. If you don't find it, then search for the next smallest number (33) and add it. Then repeat. If you don't find a match at 83, then add the next smallest number, 20. But that puts you over your target, so you discard 33 and start over with 50 and the next lowest number, 20. Now you are only looking for numbers =20. This might be the perfect place to use a recursive function, as long as you are careful to limit it's iteration cycles. No way is this going to be done quickly. -- And, while it was regarded as pretty good evidence of criminality to be living in a slum, for some reason owning a whole street of them merely got you invited to the very best social occasions. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- Ahmad Fahad AlTwaijiry -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: Print or Echo takes lots of time
Sancar Saran wrote: Hi, When I was check the performance of my system I found interesting resuts. My code stores html output into a variable. When page creation complete I printed out the variable. Problem was generation html code takes 0.5 second and just echo $strPage takes 2.0 or more second. I read a while ago that it is more efficient to echo as you go rather than store up a large variable with the content in it. You may want to investigate output buffering instead as 9 times in 10 the sames results of using a big variable can be achieved. It does seem odd none the less tho' that it takes so long. Col -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Download files outside DocumentRoot Dir
At 01:44 AM 9/25/2006, Ramiro wrote:
Hi,
i'm trying to find a good solution to this problem. I want download files
from a directory outside DocumentRoot.
This files cannot be downloaded through direct url like
http://site/test.zip. It must be downloaded after user login.
I know i can do that using some functions like fread() + fopen() or
readfile(), than i would echo file buffer to browser with correct headers.
But, reading then dumping file to browser is a big problem to server.
I've made one test that shows me i will eat 1.8% of RAM (i've used ps
aux at Linux, in a server with 2Gb of RAM) to download a 30Mb file at
60kb/s speed. So, imagine what a dump-php-script can do with 50 to 100
concurrently downloads. Probably i will need 1 TeraByte of RAM to provide
downloads ;)
Theres my question now. Is there other way to protect files against direct
downloading? (Obligating users to login and denying direct-url's).
I also know i can check referer by using Mod_Rewrite at Apache. But it isn't
secure, since referer cannot be sent or be fake.
Please, help me ;)
Thank you !
Script i used to test:
?
$url = test.tar.gz;
header('Content-Description: File Transfer');
header('Content-Type: application/force-download');
header(Content-Disposition: attachment; filename=\.basename($url).\;);
header('Content-Length: ' . filesize($url));
@readfile($url) OR die();
?
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
This is the contents of a script used to fetch .swf's. The script is called
from a Flash movie.
$filenam = $_REQUEST[filenam];
if ($filenam){
$contents = file_get_contents( ../above_root/ . $filenam );
echo $contents;
}else{
echo Not found;
}
HTH - Miles
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[PHP] Re: Re: Frustrated trying to get help from your site
Am 2006-09-22 13:36:40, schrieb Arno Kuhl: I'm not sure which examples you're referring to but if you mean the user contributed notes then the download documentation does include this - at Yes least one of the .chm versions does. It's great, but you need to download it .chm ? - Windows ??? Me??? plof regularly if you want the latest notes (obviously). Use one of the skins and it's even better (I use the phpZ skin which displays a tab for the user notes). You mean in winhlp32.exe ? Right ? It is a realy nice tool but unfortunatly for the false OS. I was already thinking on coding a linhelp program, but it seems there is one but I have not found it. I like to have html files which I can put on my internal documentation server. Greetings Michelle Konzack Systemadministrator Tamay Dogan Network Debian GNU/Linux Consultant -- Linux-User #280138 with the Linux Counter, http://counter.li.org/ # Debian GNU/Linux Consultant # Michelle Konzack Apt. 917 ICQ #328449886 50, rue de Soultz MSM LinuxMichi 0033/6/6192519367100 Strasbourg/France IRC #Debian (irc.icq.com) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] How would you do this ?
I'm building an RSS aggregator so I'm trying to find out the best way to parse users account feeds equally so Lets say we have 20.000 user with average of 10 feeds in account so we have about 200.000 feed How would you schedule the parsing process to keep all accounts always updated without killing the server? NOTE: that some of the 200.000 feeds might be shared between more than one user Now, what I was thinking of is to split users into 1-) Idle users (check their account once a week, no traffic on their RSS feeds) 2-) Idle++ (check their account once a week, but got traffic on their RSS feeds) 2-) Active users (Check their accounts regularly and they got traffic on their RSS feeds) NOTE: The week is just an example but at the end it’s going to be dynamic ratio so with this classification I can split the parsing power and time to 1-) 10% idle users 2-) 20% idle++ users 3-) 70% active users. NOTE: There is another factors that should be included but I don’t want to get the idea messy now (CPU usage, Memory usage, connectivity issues (if feed site is down) in general the MAX execution time for the continues parsing loop shouldn’t be more than 30 minutes 60 minutes) Actually I’m thinking of writing a daemon to do it “just keep checking CPU/memory” and excute whenever a reasonable amount of resource available without killing the server. Please elaborate. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Re: Re: Frustrated trying to get help from your site
On Friday 22 September 2006 16:48, Michelle Konzack wrote: Am 2006-09-22 13:36:40, schrieb Arno Kuhl: I'm not sure which examples you're referring to but if you mean the user contributed notes then the download documentation does include this - at Yes least one of the .chm versions does. It's great, but you need to download it .chm ? - Windows ??? Me??? plof regularly if you want the latest notes (obviously). Use one of the skins and it's even better (I use the phpZ skin which displays a tab for the user notes). You mean in winhlp32.exe ? Right ? It is a realy nice tool but unfortunatly for the false OS. I was already thinking on coding a linhelp program, but it seems there is one but I have not found it. I like to have html files which I can put on my internal documentation server. Greetings Michelle Konzack Systemadministrator Tamay Dogan Network Debian GNU/Linux Consultant It's not the best in the world, but it works. http://xchm.sourceforge.net/index.html But since the documentation is online and always updated that way, I prefer to just use the website. -- Ray Hauge Programmer/Systems Administrator American Student Loan Services www.americanstudentloan.com 1.800.575.1099 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: Re: Frustrated trying to get help from your site
Michelle Konzack wrote: Am 2006-09-22 13:36:40, schrieb Arno Kuhl: I'm not sure which examples you're referring to but if you mean the user contributed notes then the download documentation does include this - at Yes least one of the .chm versions does. It's great, but you need to download it .chm ? - Windows ??? Me??? plof regularly if you want the latest notes (obviously). Use one of the skins and it's even better (I use the phpZ skin which displays a tab for the user notes). You mean in winhlp32.exe ? Right ? It is a realy nice tool but unfortunatly for the false OS. I was already thinking on coding a linhelp program, but it seems there is one but I have not found it. I like to have html files which I can put on my internal documentation server. xchm is probably what you are thinking of - xchm.sourceforge.net Cheers -- David Robley Use your own toothbrush! Tom bristled. Today is Pungenday, the 49th day of Bureaucracy in the YOLD 3172. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] File Upload Security and chmod
At 9:32 PM -0600 9/24/06, Andy Hultgren wrote:
Hi Tedd,
Yes, when I browse to www.myDomain.com I get the index.html file, and so I
have been leaving the .public_html/ directory alone since it is not my
root. I'm curious, what you described is exactly what I'm trying to do -
what permissions do you set the parent folder at when you are finished
uploading/saving/downloading/etc.? I have my uploaded_images/
directory set at chmod 0100 and I can still browse to an uploaded image from
my file upload page... Thanks for your response,
Andy:
I ran into the same problem trying to work with, and understand,
permissions on a virtual host. When I asked this gang about
permissions some time back, I received answers that ranged from RTFM
to calling me stupid for using 0777, but none answered my question.
No fault of the gang, I probably didn't ask the question correctly.
In any event, I felt too stupid to ask the question again, so I went
elsewhere looking for answers and eventually found something that
works for me.
Some consider me a novice, so I'll ask the gang to overview my
comments to make sure that I'm not guiding you down the wrong path.
As you know, the key to setting the permissions of a file depends
upon the permissions the parent folder. If the parent folder
permission is set to 0777, then we can change any files inside the
folder as we want. However, that also presents a major security hole
because then anyone can use that folder to upload and run evil code.
So, the key problem is how to alter parent folder permissions.
With virtual hosting, we can upload, manage, and set permissions as
we want via our FTP connection software. So, I thought perhaps php
had something like that and as such I discovered how to ftp connect
via php.
Now, not all php ftp_commands are available to php 4, but you can
connect to your site and change permissions of folders, which is what
we actually need. So, if you want to do something with a file: then
change the folder permissions of the folder that holds it; do
whatever you want with the file; and then change the folder
permissions back to something safe.
You can also create new folders if you want using the command ftp_mkdir().
Note, the beginning of the ftp_paths are different than url paths we
would normally use to locate a file. For example:
An example web path:
http://www.yourdomain.com/rw/tmp/text.txt
An example symbolic link:
public_html/rw/tmp/text.txt
The following code will show you an example of how this works. Just
put in your own domain, user id, password, and correct paths and try
it out. Change the permissions in the code and watch how the file
permissions change.
Please let me know if this works for you -- watch for line breaks.
hth's
tedd
PS: I don't know what to say about your .public_html/ directory,
but I would just leave it alone.
---
// how to call the function
?php
$ftp_path = public_html/rw/; // note the ftp path
$theDir = tmp;
$theFile =text.txt;
FtpPerms($ftp_path, $theDir, $theFile);
?
// the function
?php
// create directory and change permissions via FTP connection
function FtpPerms($path, $theDir, $theFile)
{
$server='ftp.yourdomain.com'; // ftp server
$connection = ftp_connect($server); // connection
$user = you;
$pass = yourpassword;
$result = ftp_login($connection, $user, $pass); // login to ftp server
if ((!$connection) || (!$result))
{
echo(No connectionbr/);
return false;
exit();
}
else
{
echo(Made connectionbr/);
ftp_chdir($connection, $path); // go to destination dir
echo(Change permissionbr/);
$str=CHMOD 0755 . $theDir; // change permissions for dir (note the
space after 0775 )
ftp_site($connection, $str);
echo($strbr/);
$filename = $theDir/$theFile;
$contents = This is the contents of the file.;
echo(hrbr/Writing file br/br/);
$file = fopen( $filename, w );
fwrite( $file, $contents);
fclose( $file );
chmod($filename,0755);
echo(Change permissionbr/);
$str=CHMOD 0600 . $theDir; // change permissions back for dir
ftp_site($connection, $str);
echo($strbr/);
echo(Close connectionbr/);
ftp_close($connection); // close connection
}
}
?
--
---
http://sperling.com http://ancientstones.com http://earthstones.com
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Re: [PHP] array_sum($result)=100
On 24/09/06, Ahmad Al-Twaijiry [EMAIL PROTECTED] wrote: Hi everyone I have array of numbers and I want to get out of it a list of numbers that if I sum them it will be 100, here is my list (for example ) : $list = array(10,20,10,10,30,50,33,110,381,338,20,11,200,100); I want the result to be : $result = array( 10,20,10,10,50); as you can see in the array $result , if we array_sum($result) the result will be 100. is they any algorithm to do this ? Ah, the Subset Sum Problem - this isn't school homework by any chance? http://en.wikipedia.org/wiki/Subset_sum_problem -robin -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Download files outside DocumentRoot Dir
Ramiro wrote:
Hi,
i'm trying to find a good solution to this problem. I want download files
from a directory outside DocumentRoot.
This files cannot be downloaded through direct url like
http://site/test.zip. It must be downloaded after user login.
I know i can do that using some functions like fread() + fopen() or
readfile(), than i would echo file buffer to browser with correct headers.
But, reading then dumping file to browser is a big problem to server.
I've made one test that shows me i will eat 1.8% of RAM (i've used ps
aux at Linux, in a server with 2Gb of RAM) to download a 30Mb file at
60kb/s speed. So, imagine what a dump-php-script can do with 50 to 100
concurrently downloads. Probably i will need 1 TeraByte of RAM to provide
downloads ;)
Theres my question now. Is there other way to protect files against direct
downloading? (Obligating users to login and denying direct-url's).
I also know i can check referer by using Mod_Rewrite at Apache. But it isn't
secure, since referer cannot be sent or be fake.
Please, help me ;)
Thank you !
Script i used to test:
?
$url = test.tar.gz;
header('Content-Description: File Transfer');
header('Content-Type: application/force-download');
header(Content-Disposition: attachment; filename=\.basename($url).\;);
header('Content-Length: ' . filesize($url));
@readfile($url) OR die();
?
What you can do is put the downloads in a separate directory actually in
your webroot. Then, use a .htaccess file to include a PHP file which
checks for authentication.
ie:
File in : /var/www/htdocs/downloads/file.zip
Accessible by: http://site/downloads/file.zip
.htaccess:
php_value auto_prepend_file /var/www/htdocs/authenticate.php
authenticate.php would theoretically have some code to check that the
user is authenticated, and if not, redirect to a login screen before any
headers are sent to the user.
--
Christopher Weldon, ZCE
President CEO
Cerberus Interactive, Inc.
[EMAIL PROTECTED]
979.739.5874
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Re: [PHP] array_sum($result)=100
2006/9/25, Robin Vickery [EMAIL PROTECTED]: On 24/09/06, Ahmad Al-Twaijiry [EMAIL PROTECTED] wrote: Hi everyone I have array of numbers and I want to get out of it a list of numbers that if I sum them it will be 100, here is my list (for example ) : $list = array(10,20,10,10,30,50,33,110,381,338,20,11,200,100); I want the result to be : $result = array( 10,20,10,10,50); as you can see in the array $result , if we array_sum($result) the result will be 100. is they any algorithm to do this ? Ah, the Subset Sum Problem - this isn't school homework by any chance? You're surely mistaken, there are many practical uses of the subset sum problem in website development, like errr... shipping optimization!
Re: [PHP] RE: Error Reporting for file commands
On Mon, 2006-09-25 at 11:53 +0100, James Nunnerley wrote: Sometime ago, I posted the email below, regarding some problems with a file manager we have developed for our users. The problem still exists, and is now starting to cause complaints. Mainly from my manager, who's fed-up with receiving the error emails from the system, but it must be annoying users! The scenario is; we have a fairly large Linux cluster, with a RAID disc. Obviously because of the number of disc calls, there's a fair amount of caching. We think the problem is related to this, and would ideally like purely to suppress the error, as it's normally when the script is trying to delete something already deleted. I've tried turning off errors (error_reporting(0)) and indeed using @ on all php file system calls, but it still triggers an error. Does anyone know of any issues with suppressing errors on the following functions? - unlink - mkdir - copy - scandir All of these fail sporadically, even with the above error stuff turned off, and trigger an error. Anyone's thoughts gratefully received Are you using a custom error handler? If so your error handler has to properly handle errors that are incoming with the supression operator enabled. You can detect suppression for any given error by checking if error_reporting() is set to 0. Cheers, Rob. -- .. | InterJinn Application Framework - http://www.interjinn.com | :: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] array_sum($result)=100
On Mon, 2006-09-25 at 16:42 +0100, Robin Vickery wrote: On 24/09/06, Ahmad Al-Twaijiry [EMAIL PROTECTED] wrote: Hi everyone I have array of numbers and I want to get out of it a list of numbers that if I sum them it will be 100, here is my list (for example ) : $list = array(10,20,10,10,30,50,33,110,381,338,20,11,200,100); I want the result to be : $result = array( 10,20,10,10,50); as you can see in the array $result , if we array_sum($result) the result will be 100. is they any algorithm to do this ? Ah, the Subset Sum Problem - this isn't school homework by any chance? http://en.wikipedia.org/wiki/Subset_sum_problem Cool, I didn't know it had a specific name, all I could think of was that it sounded a lot like the knapsack problem. The Wikipedia article indicates it's a special case of the knapsack problem. Cheers, Rob. -- .. | InterJinn Application Framework - http://www.interjinn.com | :: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] array_sum($result)=100
Robin, you made it harder for me specially with wikipedia artical :) (I told you I'm bad with writing code from English paragraph) and no it's not a homework (btw: do they allow php in school ?, I remember we use basic :) ) anyway I will try to write the code and I will let you guys know (in the mean time if someone can help me in anyway I really appreciate it) On 9/25/06, Robert Cummings [EMAIL PROTECTED] wrote: On Mon, 2006-09-25 at 16:42 +0100, Robin Vickery wrote: On 24/09/06, Ahmad Al-Twaijiry [EMAIL PROTECTED] wrote: Hi everyone I have array of numbers and I want to get out of it a list of numbers that if I sum them it will be 100, here is my list (for example ) : $list = array(10,20,10,10,30,50,33,110,381,338,20,11,200,100); I want the result to be : $result = array( 10,20,10,10,50); as you can see in the array $result , if we array_sum($result) the result will be 100. is they any algorithm to do this ? Ah, the Subset Sum Problem - this isn't school homework by any chance? http://en.wikipedia.org/wiki/Subset_sum_problem Cool, I didn't know it had a specific name, all I could think of was that it sounded a lot like the knapsack problem. The Wikipedia article indicates it's a special case of the knapsack problem. Cheers, Rob. -- .. | InterJinn Application Framework - http://www.interjinn.com | :: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- Ahmad Fahad AlTwaijiry -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: reading urlencoded data from POST
If anyone else have the same problem, it is enough to turn off the magic quotes. -- Marek 'MMx' Ludha On 9/22/06, Marek 'MMx' Ludha [EMAIL PROTECTED] wrote: Hi. I need to read urlencoded data from POST request. So far I have tried $_POST['name'], but this converts each input %5C to two backslashes (instead of one) and %00 to \0 (slash zero, not zero byte) for some reason. Is there any other way to read the data apart from parsing php://input myself? Thanks in advance for any response. -- Marek 'MMx' Ludha -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] File Upload Security and chmod
Tedd,
Thanks so much your thorough response - it's good to know that I'm not the
only one trying to figure this out! I'm curious, in your code you use the
PHP ftp functions, but I have used the PHP functions chmod() and mkdir()
without establishing an ftp connection. Is it faster to establish an ftp
connection within PHP and then use the ftp series of functions to accomplish
all of the directory creation and permissions changes? If so, then I will
probably change my code to follow yours.
Andy
On 9/25/06, tedd [EMAIL PROTECTED] wrote:
At 9:32 PM -0600 9/24/06, Andy Hultgren wrote:
Hi Tedd,
Yes, when I browse to www.myDomain.com I get the index.html file, and so
I
have been leaving the .public_html/ directory alone since it is not my
root. I'm curious, what you described is exactly what I'm trying to do -
what permissions do you set the parent folder at when you are finished
uploading/saving/downloading/etc.? I have my uploaded_images/
directory set at chmod 0100 and I can still browse to an uploaded image
from
my file upload page... Thanks for your response,
Andy:
I ran into the same problem trying to work with, and understand,
permissions on a virtual host. When I asked this gang about
permissions some time back, I received answers that ranged from RTFM
to calling me stupid for using 0777, but none answered my question.
No fault of the gang, I probably didn't ask the question correctly.
In any event, I felt too stupid to ask the question again, so I went
elsewhere looking for answers and eventually found something that
works for me.
Some consider me a novice, so I'll ask the gang to overview my
comments to make sure that I'm not guiding you down the wrong path.
As you know, the key to setting the permissions of a file depends
upon the permissions the parent folder. If the parent folder
permission is set to 0777, then we can change any files inside the
folder as we want. However, that also presents a major security hole
because then anyone can use that folder to upload and run evil code.
So, the key problem is how to alter parent folder permissions.
With virtual hosting, we can upload, manage, and set permissions as
we want via our FTP connection software. So, I thought perhaps php
had something like that and as such I discovered how to ftp connect
via php.
Now, not all php ftp_commands are available to php 4, but you can
connect to your site and change permissions of folders, which is what
we actually need. So, if you want to do something with a file: then
change the folder permissions of the folder that holds it; do
whatever you want with the file; and then change the folder
permissions back to something safe.
You can also create new folders if you want using the command ftp_mkdir().
Note, the beginning of the ftp_paths are different than url paths we
would normally use to locate a file. For example:
An example web path:
http://www.yourdomain.com/rw/tmp/text.txt
An example symbolic link:
public_html/rw/tmp/text.txt
The following code will show you an example of how this works. Just
put in your own domain, user id, password, and correct paths and try
it out. Change the permissions in the code and watch how the file
permissions change.
Please let me know if this works for you -- watch for line breaks.
hth's
tedd
PS: I don't know what to say about your .public_html/ directory,
but I would just leave it alone.
---
// how to call the function
?php
$ftp_path = public_html/rw/; // note the ftp path
$theDir = tmp;
$theFile =text.txt;
FtpPerms($ftp_path, $theDir, $theFile);
?
// the function
?php
// create directory and change permissions via FTP connection
function FtpPerms($path, $theDir, $theFile)
{
$server='ftp.yourdomain.com'; // ftp server
$connection = ftp_connect($server); // connection
$user = you;
$pass = yourpassword;
$result = ftp_login($connection, $user, $pass); // login to ftp server
if ((!$connection) || (!$result))
{
echo(No connectionbr/);
return false;
exit();
}
else
{
echo(Made connectionbr/);
ftp_chdir($connection, $path); // go to destination dir
echo(Change permissionbr/);
$str=CHMOD 0755 . $theDir; // change permissions for dir (note the
space after 0775 )
ftp_site($connection, $str);
echo($strbr/);
$filename = $theDir/$theFile;
$contents = This is the contents of the file.;
echo(hrbr/Writing file br/br/);
$file = fopen( $filename, w );
fwrite( $file, $contents);
fclose( $file );
chmod($filename,0755);
echo(Change permissionbr/);
$str=CHMOD 0600 . $theDir; // change permissions back for dir
ftp_site($connection, $str);
echo($strbr/);
echo(Close connectionbr/);
ftp_close($connection); // close connection
}
}
?
--
---
http://sperling.com http://ancientstones.com http://earthstones.com
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Re: [PHP] array_sum($result)=100
Finally I found a solution :) Thanks to Mr. Phil Rogaway
I found a very small C++ code from Mr. Phil Rogaway in
http://www.cs.ucdavis.edu/~rogaway/classes/122A/spring00/prog1.C
I convert it to php and here is the result (I already test it, try it
and let me know if you find any bug):
//code #1 it will print the result to stdout:
?php
// prog2.php
//
// Subset sum demonstration code.
// Written for ECS 122a by Phil Rogaway (Spring 2000)
//
// http://www.cs.ucdavis.edu/~rogaway/classes/122A/spring00/prog1.C
// converted to php by Ahmad AlTwaijiry (ahmadt at gmail.com) 25/Sep/2006
$price = 40;
$list = array(0,3,2,3,6,2,120,11,220,11,22,10,2,5,7,1,4,20,40);
SubsetSUM($price,$list);
function PrintSolution($A, $i,$list)
{
if ($i==0) return;
else if ($i0) print ERROR\n;
else if ($A[$i]==-1) print No Solution Possible\n;
else {PrintSolution($A, $i-$list[$A[$i]],$list);
print Take item . $A[$i] . (which is . $list[$A[$i]] . )\n;}
}
function SubsetSUM($price,$list)
{
$A=array();
$N=sizeof($list)-1;
print Subset Sum Demonstration Code\n\n;
print The array is [ ;
for ($i=1; $i=$N; $i++) print (.$list[$i] . ) ;
print ] and the target value is . $price . \n\n;
//
// OK, here it is!
//
for ($b=1; $b=$price; $b++) $A[$b] = -1;
for ($n=1; $n=$N; $n++) {
for ($b=$price; $b=1;$b--) {
if ($A[$b]==-1
($b==$list[$n] || ($list[$n]$b $A[$b-$list[$n]]!=-1))) $A[$b]=$n;
}
}
PrintSolution($A, $price,$list);
print \n;
}
?
//code #2 it will return the result as array (so you can use it in your code) :
?php
// prog3.php
//
// Subset sum demonstration code.
// Written for ECS 122a by Phil Rogaway (Spring 2000)
//
// http://www.cs.ucdavis.edu/~rogaway/classes/122A/spring00/prog1.C
// converted to php by Ahmad AlTwaijiry (ahmadt at gmail.com) 25/Sep/2006
$price = 50;
$list = array(0,3,2,3,6,2,120,11,220,11,22,10,2,5,7,1,4,20,40);
$result = SubsetSUM($price,$list);
if(is_array($result)) {
print_r($result);
}else {
print -$result\n;
}
function PrintSubsetSUM($A, $i,$list,$result, $limit=30)
{
static $max_recursive = 0;
//if we call function PrintSubsetSUM more than $limit then return null
if ( $max_recursive $limit ) { $result =Reached $limit; return; }
$max_recursive++;
if ($i==0) return;
else if ($i0) { $result = ERROR; return; }
else if ($A[$i]==-1) { $result= No Solution; return;}
else { PrintSubsetSUM($A, $i-$list[$A[$i]],$list,$result);
$result[$A[$i]] = $list[$A[$i]];}
}
function SubsetSUM($price,$list)
{
$A=array();
$N=sizeof($list)-1;
$result = array();
for ($b=1; $b=$price; $b++) $A[$b] = -1;
for ($n=1; $n=$N; $n++) {
for ($b=$price; $b=1;$b--) {
if ($A[$b]==-1
($b==$list[$n] || ($list[$n]$b $A[$b-$list[$n]]!=-1))) $A[$b]=$n;
}
}
PrintSubsetSUM($A, $price,$list,$result);
return $result;
}
?
On 9/25/06, Ahmad Al-Twaijiry [EMAIL PROTECTED] wrote:
Robin,
you made it harder for me specially with wikipedia artical :) (I told
you I'm bad with writing code from English paragraph)
and no it's not a homework (btw: do they allow php in school ?, I
remember we use basic :) )
anyway I will try to write the code and I will let you guys know (in
the mean time if someone can help me in anyway I really appreciate it)
On 9/25/06, Robert Cummings [EMAIL PROTECTED] wrote:
On Mon, 2006-09-25 at 16:42 +0100, Robin Vickery wrote:
On 24/09/06, Ahmad Al-Twaijiry [EMAIL PROTECTED] wrote:
Hi everyone
I have array of numbers and I want to get out of it a list of numbers
that if I sum them it will be 100, here is my list (for example ) :
$list = array(10,20,10,10,30,50,33,110,381,338,20,11,200,100);
I want the result to be :
$result = array( 10,20,10,10,50);
as you can see in the array $result , if we array_sum($result) the
result will be 100.
is they any algorithm to do this ?
Ah, the Subset Sum Problem - this isn't school homework by any chance?
http://en.wikipedia.org/wiki/Subset_sum_problem
Cool, I didn't know it had a specific name, all I could think of was
that it sounded a lot like the knapsack problem. The Wikipedia article
indicates it's a special case of the knapsack problem.
Cheers,
Rob.
--
..
| InterJinn Application Framework - http://www.interjinn.com |
::
| An application and templating framework for PHP. Boasting |
| a powerful, scalable system for accessing system services |
| such as forms, properties, sessions, and caches. InterJinn |
| also provides an extremely flexible architecture for |
| creating re-usable components quickly and easily. |
`'
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
--
Ahmad Fahad AlTwaijiry
--
Ahmad Fahad AlTwaijiry
--
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Re: [PHP] File Upload Security and chmod
On 9/25/06, Andy Hultgren [EMAIL PROTECTED] wrote: Tedd, Thanks so much your thorough response - it's good to know that I'm not the only one trying to figure this out! I'm curious, in your code you use the PHP ftp functions, but I have used the PHP functions chmod() and mkdir() without establishing an ftp connection. Is it faster to establish an ftp connection within PHP and then use the ftp series of functions to accomplish all of the directory creation and permissions changes? If so, then I will probably change my code to follow yours. Andy By using FTP you can specify which user account you want the connection to be established at. When running a PHP script the script will be running by the Apache server, which means it will have specific permission levels which cannot create directories or chmod unless Apache owns the parent directory. That is why Tedd went through all that trouble.
Re: [PHP] File Upload Security and chmod
Andy: It was never a question of speed for me -- it was a question of being able to change file permissions from within a php script so that I could create and write files safely. You see, I am *not* able to use chmod() within a php script at all regardless of what permissions the file and parent folder have -- even when both are set to 0777. To do any permissions changing from within a php script I am forced to resort to a ftp connection as I previously described. I can't even create a file, nor open a file for writing, without the parent folder having 0777 permissions. The only option I had was to set parent folders to 0777 and leave them that way, and I wasn't going to do that for security reasons. Now, perhaps something is wrong with my server (or me) -- but -- I have more than one server and the same tests held true for all of them. So, if you can chmod() and mkdir() from within your php script without establishing an ftp connection, then more power to you, because I can't. And that's the reason I use ftp_login. I thought that you had the same problem. Now, perhaps I should RTFM again -- but -- I have read it and I have not found another method that works to change permissions other than to use ftp_logon. I suspect that this problem may be pretty obvious to the gang, but I don't know if anyone cares to comment. Comments? tedd --- At 1:11 PM -0600 9/25/06, Andy Hultgren wrote: Tedd, Thanks so much your thorough response - it's good to know that I'm not the only one trying to figure this out! I'm curious, in your code you use the PHP ftp functions, but I have used the PHP functions chmod() and mkdir() without establishing an ftp connection. Is it faster to establish an ftp connection within PHP and then use the ftp series of functions to accomplish all of the directory creation and permissions changes? If so, then I will probably change my code to follow yours. Andy On 9/25/06, tedd mailto:[EMAIL PROTECTED][EMAIL PROTECTED] wrote: At 9:32 PM -0600 9/24/06, Andy Hultgren wrote: Hi Tedd, Yes, when I browse to http://www.myDomain.com www.myDomain.com I get the index.html file, and so I have been leaving the .public_html/ directory alone since it is not my root. I'm curious, what you described is exactly what I'm trying to do - what permissions do you set the parent folder at when you are finished uploading/saving/downloading/etc.? I have my uploaded_images/ directory set at chmod 0100 and I can still browse to an uploaded image from my file upload page... Thanks for your response, Andy: I ran into the same problem trying to work with, and understand, permissions on a virtual host. When I asked this gang about permissions some time back, I received answers that ranged from RTFM to calling me stupid for using 0777, but none answered my question. No fault of the gang, I probably didn't ask the question correctly. In any event, I felt too stupid to ask the question again, so I went elsewhere looking for answers and eventually found something that works for me. Some consider me a novice, so I'll ask the gang to overview my comments to make sure that I'm not guiding you down the wrong path. As you know, the key to setting the permissions of a file depends upon the permissions the parent folder. If the parent folder permission is set to 0777, then we can change any files inside the folder as we want. However, that also presents a major security hole because then anyone can use that folder to upload and run evil code. So, the key problem is how to alter parent folder permissions. With virtual hosting, we can upload, manage, and set permissions as we want via our FTP connection software. So, I thought perhaps php had something like that and as such I discovered how to ftp connect via php. Now, not all php ftp_commands are available to php 4, but you can connect to your site and change permissions of folders, which is what we actually need. So, if you want to do something with a file: then change the folder permissions of the folder that holds it; do whatever you want with the file; and then change the folder permissions back to something safe. You can also create new folders if you want using the command ftp_mkdir(). Note, the beginning of the ftp_paths are different than url paths we would normally use to locate a file. For example: An example web path: http://www.yourdomain.com/rw/tmp/text.txthttp://www.yourdomain.com/rw/tmp/text.txt An example symbolic link: public_html/rw/tmp/text.txt The following code will show you an example of how this works. Just put in your own domain, user id, password, and correct paths and try it out. Change the permissions in the code and watch how the file permissions change. Please let me know if this works for you -- watch for line breaks. hth's tedd PS: I don't know what to say about your .public_html/ directory, but I would just leave it alone. --- // how to call the function ?php $ftp_path =
[PHP] manage/modify linux file/folder structure...
hi... i'm trying to find out if there's a php webapp that allows a user to modify the underlying file structure (files/folders) for a linux system i'd like to be able to: -view file/folder/dir structure -list the dir structure -add/create/delete/copy/move files -add/create/delete/copy/move folders -change/modify file/folder perms/privs -etc.. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] File Upload Security and chmod
Well, that didn't sound too good... So I tried to implement the example code given in the php tmpfile() documentation and it wouldn't do anything, which suggests that I don't have access to the /tmp directory. Also, the FAQ's section on my server's website say that /tmp is not shared between the servers. So, looks like /tmp option is out... So, let me see if I understand the situation I'm looking at here: The bad side: -- I don't have any place to put uploaded files outside of my webtree, which makes it tough to ensure these files cannot be surfed to once they are uploaded, and also means I have to do my security checks while the files are within my webtree and potentially accessible. (BAD). -- Any php script on my server (created by me or somehow maliciously uploaded) can do whatever it wants within my account because all php scripts run as me. (also BAD). The good side: -- Uploaded files can be chmod so that nobody can read them, then I chmod them when I need to use them. This adds a layer of protection for completely uploaded files. I assume this will not help with files while they are getting their security checks, since PHP has to be able to read and execute them in order to run the checks (get_image_size, etc.)? -- Since I'm only allowing image uploads, I can strictly filter which files are allowed to be uploaded (with extension checks and get_image_size). (Plus all the stuff talked about in the PHP Security Guide provided by the PHP Security Consortium for html POSTs, MySQL stuff, cookies, etc. Well, all of it that I can implement without having access to a directory outside of my webtree anyway). So, given this situation (if I've got it right), I have two questions: 1) With the above as is, am I just asking for anyone to come in and tear my site apart? I am not an experienced web developer (obviously), but I love to read. Is that enough to build a secure site, or am I just way in over my head? 2) Imaging that I can convince my host to rebuild my site so that I have access to directories outside of my webtree and can check and save uploaded files there, does that make the situation substantially better? Or is the PHP running as me thing enough alone to raise some serious serious problems (perhaps less around the image uploading but more around a login page or something)? As always, thank you so much for your help. Andy On 9/25/06, Richard Lynch [EMAIL PROTECTED] wrote: On Sun, September 24, 2006 11:04 pm, Andy Hultgren wrote: I really appreciate your help with this. To answer your first question: when people surf to my site they see the stuff next to (outside) .public_html/, not anything within .public_html/. (Thanks by the way for explaining the .dirName invisibility thing, that's one confusing thing not to worry about anymore!) Hmmm. Okay, so you definitely do not have any space outside the webtree. That's bad. Anything you upload is stuck being available to the public, to some degree. :-( You *may* be able to utilize /tmp See if you can write a short little script with http://php.net/tmpfile This will give you and idea if you can stash things in /tmp, at least until you can confirm that they are not Evil. To answer your second question: the uploadedFiles/ directory is 0100, but not the file. The uploaded file itself is 0640. So your login is allowed to read files within the directory, but not to list what's in the directory. Your login and your group can read the file itself. Your login can write the file as well. See next question/answer. Third question: it runs as the same username I use to login to my server's ftp site. This information wasn't in the output of the phpinfo() function (that I could find). I did some searching on php.net and found this entry under the get_current_user() function ( http://us3.php.net/manual/en/function.get-current-user.php, top user contributed note): ** *to get the username of the process owner (rather than the file owner), you can use: **?php $processUser = posix_getpwuid(posix_geteuid**()); print $processUser['name'**]; ? * ** I used this code to find out the user PHP runs as. Is that what you were looking for? Yes. And since PHP runs as you with your login, it can do everything listed above. So you probably cannot surf to the DIRECTORY and get a listing (even if DirectoryIndex is on) but if you know the name of the file in advance, you can surf to it. So if you want to make a file not readable, you have to chmod it so that *YOU* cannot read it. This will be a PITA because then you'll need to chmod it back any time you want to mess with it. As the owner of a file, you are allowed to chmod it so that you yourself cannot read it -- kind of like locking it away in a safe -- and then you have to chmod it back to readable (open the safe) to read it. You still own the file, so you can always chmod it anywhich way you want, at any time. Running your webserver as you gives it a lot of power
Re: [PHP] manage/modify linux file/folder structure...
bruce wrote: i'm trying to find out if there's a php webapp that allows a user to modify the underlying file structure (files/folders) for a linux system i'd like to be able to: -view file/folder/dir structure -list the dir structure -add/create/delete/copy/move files -add/create/delete/copy/move folders -change/modify file/folder perms/privs -etc.. Google for php file manager - there are lots of them around, but remember that they are 1) a huge security risk, and 2) limited by the filesystem permissions of the web server user. -Stut -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] manage/modify linux file/folder structure...
i should state... while i've seen different apps... i'm more interested in any that have actually been used by you, or someone you know!! an app that comes with references! -Original Message- From: Stut [mailto:[EMAIL PROTECTED] Sent: Monday, September 25, 2006 1:59 PM To: [EMAIL PROTECTED] Cc: php-general@lists.php.net Subject: Re: [PHP] manage/modify linux file/folder structure... bruce wrote: i'm trying to find out if there's a php webapp that allows a user to modify the underlying file structure (files/folders) for a linux system i'd like to be able to: -view file/folder/dir structure -list the dir structure -add/create/delete/copy/move files -add/create/delete/copy/move folders -change/modify file/folder perms/privs -etc.. Google for php file manager - there are lots of them around, but remember that they are 1) a huge security risk, and 2) limited by the filesystem permissions of the web server user. -Stut -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] array_sum($result)=100
At 1:50 PM -0300 9/25/06, Martin Alterisio wrote: 2006/9/25, Robin Vickery [EMAIL PROTECTED]: On 24/09/06, Ahmad Al-Twaijiry [EMAIL PROTECTED] wrote: Hi everyone I have array of numbers and I want to get out of it a list of numbers that if I sum them it will be 100, here is my list (for example ) : $list = array(10,20,10,10,30,50,33,110,381,338,20,11,200,100); I want the result to be : $result = array( 10,20,10,10,50); as you can see in the array $result , if we array_sum($result) the result will be 100. is they any algorithm to do this ? Ah, the Subset Sum Problem - this isn't school homework by any chance? You're surely mistaken, there are many practical uses of the subset sum problem in website development, like errr... shipping optimization! Don't forget real world problems like when my wife gives me $100, a shopping list, and says bring back as many items as you can. Or when I take all 10 grand-kids to McDonald's and try to buy each kid as much as I can with $20 -- my vector calculus classes in grad school didn't prepare me for that high level math. :-) tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] File Upload Security and chmod
Hey Tedd and Eric, Between the two of you and Richard Lynch's last post, I understand why I can use chmod() and mkdir() within php without having to use the ftp commands: I run on a server that is configured to run my php scripts as username (ie. me!) instead of as nobody (which is much more common). So my php scripts have powers which they probably shouldn't have. So, Tedd, you don't have to go back to the manual it looks like you are exactly right, I'm just on a goofy server which is the exception to the rule (for better or for worse). I really appreciate you guys jumping in a giving me a hand. Hopefully I get good enough at this that I can return the favor sometime!!! Andy On 9/25/06, Eric Butera [EMAIL PROTECTED] wrote: On 9/25/06, Andy Hultgren [EMAIL PROTECTED] wrote: Tedd, Thanks so much your thorough response - it's good to know that I'm not the only one trying to figure this out! I'm curious, in your code you use the PHP ftp functions, but I have used the PHP functions chmod() and mkdir() without establishing an ftp connection. Is it faster to establish an ftp connection within PHP and then use the ftp series of functions to accomplish all of the directory creation and permissions changes? If so, then I will probably change my code to follow yours. Andy By using FTP you can specify which user account you want the connection to be established at. When running a PHP script the script will be running by the Apache server, which means it will have specific permission levels which cannot create directories or chmod unless Apache owns the parent directory. That is why Tedd went through all that trouble.
Re: [PHP] Download files outside DocumentRoot Dir
On 2:36 pm 09/25/06 Ramiro Cavalcanti [EMAIL PROTECTED] wrote: Hi Christopher, at first, thank you for your answer. I'd like to know if it's possible use this when php is running like cgi (php-suexec). I've put this code at httpd.conf at module php, then tryed to use it at .htaccess, but without successs. Thank you again. Oh, in that case, you most definitely can't use the .htaccess conditions. PHP will have issues if you are running php-suexec. I'll see if I can think of any other ways around this, but php-suexec definitely limits your usage for this simple fix right now. -- Chris Weldon -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Print or Echo takes lots of time
On 25 Sep 2006, at 06:11 , Sancar Saran wrote: $strPage = html yada dayda; ... $strPage.= another html tags; ... $strPage.= getSqlDataAndCreateSomeHtmlCOde(); If this is generating hundred of K of HTML, use ' instead of (yes, it's faster). -- I'm sitting here with 4 Megs of RAM trying to figure out how to use it all... :-) (Me, in 1990) I'm sitting here with 4 Gigs of RAM trying to figure out how to use it all... :-) (Me, in 2005) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Print or Echo takes lots of time
On Mon, 2006-09-25 at 17:39 -0600, Google Kreme wrote: I'm sitting here with 4 Gigs of RAM trying to figure out how to use it all... :-) (Me, in 2005) Not really related to the post... but I find a good way to eat up 4 gigs of RAM is to run several VMWare nodes :) Depending on what these nodes do, it can also be a great way to eat up those dual core processors :) Cheers, Rob. -- .. | InterJinn Application Framework - http://www.interjinn.com | :: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] web app to manage svnserve.conf file
hi... does anybody know of an app/client or webbased app that is used to modify the svn svnserve.conf file. (i'm not referring to an editor...!!) i'm trying to find an app, that would allow me to create a dir/folder in a repository, and would allow me to create the groups/users for the given dir/folder. the app would also allow me to specify the required user access roles/privs... finally, the app would write all this into the svnserve.conf file... any thoughts/comments/ideas... thanks -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
