Predefined Constants

The following list of signals are supported by the Process Control functions. Please see your systems signal(7) man page for details of the default behavior of these signals.

Process Control constants
WNOHANG (int)
WUNTRACED (int)
SIG_* constants
SIG_IGN (int)
SIG_DFL (int)
SIG_ERR (int)
SIGHUP (int)
SIGINT (int)
SIGQUIT (int)
SIGILL (int)
SIGTRAP (int)
SIGABRT (int)
SIGIOT (int)
SIGBUS (int)
SIGFPE (int)
SIGKILL (int)
SIGUSR1 (int)
SIGSEGV (int)
SIGUSR2 (int)
SIGPIPE (int)
SIGALRM (int)
SIGTERM (int)
SIGSTKFLT (int)
SIGCLD (int)
SIGCHLD (int)
SIGCONT (int)
SIGSTOP (int)
SIGTSTP (int)
SIGTTIN (int)
SIGTTOU (int)
SIGURG (int)
SIGXCPU (int)
SIGXFSZ (int)
SIGVTALRM (int)
SIGPROF (int)
SIGWINCH (int)
SIGPOLL (int)
SIGIO (int)
SIGPWR (int)
SIGSYS (int)
SIGBABY (int)
SIG_BLOCK (int)
SIG_UNBLOCK (int)
SIG_SETMASK (int)
SI_* constants
SI_USER (int)
SI_NOINFO (int)
SI_KERNEL (int)
SI_QUEUE (int)
SI_TIMER (int)
SI_MSGGQ (int)
SI_ASYNCIO (int)
SI_SIGIO (int)
SI_TKILL (int)
CLD_* constants
CLD_EXITED (int)
CLD_KILLED (int)
CLD_DUMPED (int)
CLD_TRAPPED (int)
CLD_STOPPED (int)
CLD_CONTINUED (int)
TRAP_* constants
TRAP_BRKPT (int)
TRAP_TRACE (int)
POLL_* constants
POLL_IN (int)
POLL_OUT (int)
POLL_MSG (int)
POLL_ERR (int)
POLL_PRI (int)
POLL_HUP (int)
ILL_* constants
ILL_ILLOPC (int)
ILL_ILLOPN (int)
ILL_ILLADR (int)
ILL_ILLTRP (int)
ILL_PRVOPC (int)
ILL_PRVREG (int)
ILL_COPROC (int)
ILL_BADSTK (int)
FPE_* constants
FPE_INTDIV (int)
FPE_INTOVF (int)
FPE_FLTDIV (int)
FPE_FLTOVF (int)
FPE_FLTUND (int)
FPE_FLTRES (int)
FPE_FLTINV (int)
FPE_FLTSUB (int)
SEGV_* constants
SEGV_MAPERR (int)
SEGV_ACCERR (int)
BUS_* constants
BUS_ADRALN (int)
BUS_ADRERR (int)
BUS_OBJERR (int)
CLONE_* constants
CLONE_NEWNS (int)
Available as of PHP 7.4.0
CLONE_NEWIPC (int)
Available as of PHP 7.4.0
CLONE_NEWUTS (int)
Available as of PHP 7.4.0
CLONE_NEWNET (int)
Available as of PHP 7.4.0
CLONE_NEWPID (int)
Available as of PHP 7.4.0
CLONE_NEWUSER (int)
Available as of PHP 7.4.0
CLONE_NEWCGROUP (int)
Available as of PHP 7.4.0
PRIO_* constants
PRIO_PGRP (int)
PRIO_USER (int)
PRIO_PROCESS (int)
PRIO_DARWIN_BG (int)
Available as of PHP 8.1.0.
PRIO_DARWIN_THREAD (int)
Available as of PHP 8.1.0.