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.