When I use chmod() to change permissions at run time, it gives me the below message:
Warning: chmod() [function.chmod]: Operation not permitted in /home/loud/public_html/readalbum.php
How can I remove this error and make the chmod function work?
This question is related to
php
permissions
chmod
In order to perform chmod, you need to be owner of the file you are trying to modify, or the root user.
You, or most likely your sysadmin, will need to login as root and run the chown command: http://www.computerhope.com/unix/uchown.htm
Through this command you will become the owner of the file.
Or, you can be a member of a group that owns this file and then you can use chmod.
But, talk with your sysadmin.
This is a tricky question.
There a set of problems about file permissions. If you can do this at the command line
$ sudo chown myaccount /path/to/file
then you have a standard permissions problem. Make sure you own the file and have permission to modify the directory.
If you cannnot get permissions, then you have probably mounted a FAT-32 filesystem. If you ls -l the file, and you find it is owned by root and a member of the "plugdev" group, then you are certain its the issue. FAT-32 permissions are set at the time of mounting, using the line of /etc/fstab file. You can set the uid/gid of all the files like this:
UUID=C14C-CE25 /big vfat utf8,umask=007,uid=1000,gid=1000 0 1
Also, note that the FAT-32 won't take symbolic links.
Wrote the whole thing up at http://www.charlesmerriam.com/blog/2009/12/operation-not-permitted-and-the-fat-32-system/
Source: Stackoverflow.com