I'm having a problem. In my PHP host when I create a file or dir (via rename() or mkdir()) my files are created with OWNER 48, GROUP 48, instead of FTP OWNER/GROUP (like other hosts).
The problem is that if I do a mkdir() for instance, via PHP, I can't manager this dir (like put some files in, rename dir or remove), even in PHP! If I create this dir via FTP I can do all. Really strange.
Now I need know: I'm wrong or my PHP Host is bugged? They told me that it's a code problem.
My code:
mkdir($image_dir, 0777, true);
It'll create on FTP something like that:
NAME TYPE DATE PERMS OWNER/GROUP
./1967 [DIR] [DATE] fle (0755) 48/48
Even I set chmod on mkdir() to 0777, it create like 0755.
So, I can do something, or my host need does?
Thanks!
at first this is not strange, it's good that webserver/php are running as a different user than your ftp client.
well this is ugly but may help you: in php use umask(0000); before any file operations. it will try to make all files and directories 0777 when created by php.
you should check if webserver/php and ftp client are at least in the same group so you can use the umask 0007.
btw. does php run in safe mode? it could prevent making files writable to other users... anyway you should be sure to disable it as it's deprecated since php 5.3 and removed since 5.4
Related
I'm facing a problem with deleting video files from folder using php unlink() function , image are deleting but when trying deleting videos it says
unlink(file_path) : permission denied.
You (running your script as either through CLI or a webserver) need write access to the directory in which the files are located. so access to the file is not enough.
Your image directory would be different and writable for webserver or cli.
chmod("your/video/dir/path",0777);
try using above code before unlink the video in your script.
Edit: Looks like you are using Windows. Unfortunately, my answer is for Unix-like operating systems (so Linux, MacOS). You could try installing Bash extension for Win8+, but still I'm not sure if this would work. However, I'm keeping my answer in case of anyone with similar problem is looking here for an answer.
Changing permissions through PHP might work in some cases, but not always, because if you don't have permissions to delete the file you might also not have permissions to change them.
The best solution is to create a directory where you will keep files to which PHP will have full access. Let's call it dirname. Once you have created a directory, change its owner and group to the one corresponding to your web server user's name (if you're using Apache, it's "www-data"), for example: chown www-data:www-data dirname.
Once you've done that, change folder's permissions. My suggestion is 744, it will assure that user who owns it will have all permissions, and everyone else will be able only to read it. To do that, execute the following command: chmod -R 777 dirname.
Now you should be able to do anything you want with the files in given directory directly from PHP.
What permissions do I need to set up on a directory in order to make it writable by php?
By "writable", I mean copying and creation of new files within that directory automatically by php itself.
I'm testing this on a free host, and the default permissions are 755.
When I try executing a php script, that attempts to create another subfolder of that directory, and copy certain files in it, and it fails.
If I set it up to 777, it works fine, but I assume that doesn't work on all Apache versions because of security reasons?
Also, when creating new files, does php act as the "owner"?
Whatever process that runs the PHP interpreter should should have a user account associated with it. Only that user needs write permission in the directory. So to answer your last question, it's usually www-data or apache that is the owner of that file.
Permission of 777 will work because it allows everyone to read, write and execute that directory but depending on your application this might be a security hole.
I have a script that uploads a *.csv to import into a DB table that I have which works great in linux through chmod($target, 0777); but I can't for the life of me find the solution to do exactly this but on a Windows based Apache server.
Some other posts have people responding "don't put in the 0777 and it should work" but that's not the case for me. Thanks!
Thanks to the comment left on my original post I was able to figure it out with a little more help from https://web.archive.org/web/20171121192635/http://www.howyoudo.info/index.php/how-to-fix-windows-server-upload-file-inherit-permissions-error/
The problem only happens when you use PHP to upload a file. When you upload a file, PHP sends the file to a temporary directory on the
hard drive (for me it is C:\Windows\Temp) and then copies it over to
it’s intended directory. Once the file has landed in the temporary
directory, it is assigned the permissions of that directory. The
problem is when Windows copies that file, it keeps the temporary
directory’s permissions and doesn’t inherit your web directory’s
permissions.
The easiest way to fix this problem is to add to the temporary directory your intended web directory’s permissions. There’s no need
to erase the permissions already in the temporary directory, just add
the web directory’s permissions to them. In other words, follow these
steps
To change the permissions of your temporary upload directory, find
the “upload_tmp_dir” in your php.ini file.
Set it to the directory
of your choosing (outside your web folders of course) or leave it at
default (for me it is C:\Windows\Temp).
Browse to this folder and add the permissions of your web folders to it.
While Brian Leishman's answer will work, if you do not have the ability to edit permissions on the temp folder, you can make your uploaded file inherit permissions from its new location manually with the following on the command line:
icacls "target.txt" /q /c /reset
So, using PHP's exec() function:
exec( 'icacls "target.txt" /q /c /reset' );
For details of the various icacls flags, see: https://technet.microsoft.com/en-us/library/cc753525.aspx
Tip: Using the /t flag, you can use pattern matching to process multiple files.
I want to write text file using PHP.
I can write it using fopen and fwrite function on Windows platform. But, that program is not able to write it on Linux Platform.
Is there any solution?
fopen and fwrite work exactly the same on Linux, but you may have a permission issue there. To solve this, you need to check:
the user under which PHP runs (in a vanilla Apache/PHP install, this is usually www-data)
the permissions and ownership of the directory you are trying to write to
What you need is write permission on the directory for the PHP/Apache user. The easiest (and dirtiest) way of achieving this is is to just make the directory world-writable (chmod o+w the_dir), but this is highly insecure, allowing anyone with any kind of access to the system to store stuff there. A better solution is to either make the PHP user the owner of the directory and specify permission 700 (or 755 if you want it to be world-readable), or create a new group, put the PHP user and yourself in that group, set the group on the directory, and set permission 770 (775 for world-readability) on the directory.
It should work, please check the users permission to the directory and/or file.
You always can try this program writing to /tmp/my.log, it should work)
Of course, you can use the same fopen and fwrite functions on Linux.
The only special thing is that the folder where it's written (or at least the file itself) must be given write permissions.
An easy way to test it would be to set the file permission (or its folder) to 777.
fopen and fwrite works on both SO.
Probabily you have permission denied. Try to give write perms on your file on linux.
You can use php chmod func
How should I handle image uploading using PHP?
How should I handle the chmod settings?
Example;
I have a dir called /image/ where i want to upload all my images.
Should I set this dir to chmod 777 and leave it like that? Or should i change chmod on that folder via PHP each time I need to upload a image. Is this correct, or should I be doing something else?
As thephpdeveloper mentioned, setting chmod once is enough. All subsequent writes into that directory will not change the directory permissions unless you explicitly chmod it to another permissions somewhere else.
The recommended permissions for directories on a *nix server is 755.
Setting permissions to 777 is not recommended. As mentioned by wic, it gives full permissions to everyone that have access to your server. Which makes it vulnerable if you are on shared hosting or sharing the server with other users.
Also to note is how PHP is run on your server. In fact, if you are running PHP as cgi, example suphp, permissions of 777 for directories are not allowed. Having 777 permissions on the directories your scripts reside in will not run and will instead cause a "500 internal server error" when attempting to execute them.
I recomend chmoding to 755
Only the user running the web server dameon needs permissions to the directory for writing. And you certainly don't want execute permissions on a directory users are uploading to.
Usually, folder settings are set once and that's it. It's rather pointless to keep setting the folder permissions to 777 via PHP, when you have already set it to 777.
No, you dont have to change the permissions on the directory each time. Once set, they are set so to speak.
Using 777 is overkill since it gives full permissions to everyone. Remove the 'x' bit and let apache (or whoever) own the directory. This makes it impossible to list files.