كود PHP:
* core - limits the core file size (KB)
* data - max data size (KB)
* fsize - maximum filesize (KB)
* memlock - max locked-in-memory address space (KB)
* nofile - max number of open files
* rss - max resident set size (KB)
* stack - max stack size (KB)
* cpu - max CPU time (MIN)
* nproc - max number of processes
* as - address space limit
* maxlogins - max number of logins for this user
* maxsyslogins - max number of logins on the system
* priority - the priority to run user process with
* locks - max number of file locks the user can hold
* sigpending - max number of pending signals
* msgqueue - max memory used by POSIX message queues (bytes)
* nice - max nice priority allowed to raise to
* rtprio - max realtime priority
* chroot - change root to directory (Debian-specific)
