PHP related system functions_PHP tutorial

get_current_user () Gets the name of the owner of the current PHP script

substr(sprintf("%o",fileperms(getcwd())),-4) Get the current file/directory permissions

scandir(getcwd()) Gets all files/directories in the current directory

print_r(posix_getpwuid(10000)); Get user information of a certain uid

chmod("test.txt",0777); Modify the permissions of the specified file or directory

The fileowner() function returns the owner of the file.
php_uname() Get system type and version
getmyuid() Get the UID number of the owner of the PHP script page

print_r (ini_get_all()); Get all configuration options

print_r (php_ini_scanned_files()); Returns the configuration file list in the configuration file directory

$uid = @posix_getpwuid(@posix_geteuid()); Get the current UID information
$gid = @posix_getgrgid(@posix_getegid()); Get the current group GID information
$user = $uid['name']; Extract name
from the user information array $uid = $uid['uid']; Extract uid
from the current user information array $group = $gid['name']; Extract name
from the current group information array $gid = $gid['gid']; Extract gid

Excerpted from: lostwolf's Blog