&reftitle.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.

`WNOHANG` (`integer`)

`WUNTRACED` (`integer`)

`SIG_IGN` (`integer`)

`SIG_DFL` (`integer`)

`SIG_ERR` (`integer`)

`SIGHUP` (`integer`)

`SIGINT` (`integer`)

`SIGQUIT` (`integer`)

`SIGILL` (`integer`)

`SIGTRAP` (`integer`)

`SIGABRT` (`integer`)

`SIGIOT` (`integer`)

`SIGBUS` (`integer`)

`SIGFPE` (`integer`)

`SIGKILL` (`integer`)

`SIGUSR1` (`integer`)

`SIGSEGV` (`integer`)

`SIGUSR2` (`integer`)

`SIGPIPE` (`integer`)

`SIGALRM` (`integer`)

`SIGTERM` (`integer`)

`SIGSTKFLT` (`integer`)

`SIGCLD` (`integer`)

`SIGCHLD` (`integer`)

`SIGCONT` (`integer`)

`SIGSTOP` (`integer`)

`SIGTSTP` (`integer`)

`SIGTTIN` (`integer`)

`SIGTTOU` (`integer`)

`SIGURG` (`integer`)

`SIGXCPU` (`integer`)

`SIGXFSZ` (`integer`)

`SIGVTALRM` (`integer`)

`SIGPROF` (`integer`)

`SIGWINCH` (`integer`)

`SIGPOLL` (`integer`)

`SIGIO` (`integer`)

`SIGPWR` (`integer`)

`SIGSYS` (`integer`)

`SIGBABY` (`integer`)

`SIG_BLOCK` (`integer`)

- Available since PHP 5.3.0.

`SIG_UNBLOCK` (`integer`)

- Available since PHP 5.3.0.

`SIG_SETMASK` (`integer`)

- Available since PHP 5.3.0.

`SI_USER` (`integer`)

- Available since PHP 5.3.0.

`SI_NOINFO` (`integer`)

- Available since PHP 5.3.0.

`SI_KERNEL` (`integer`)

- Available since PHP 5.3.0.

`SI_QUEUE` (`integer`)

- Available since PHP 5.3.0.

`SI_TIMER` (`integer`)

- Available since PHP 5.3.0.

`SI_MSGGQ` (`integer`)

- Available since PHP 5.3.0.

`SI_ASYNCIO` (`integer`)

- Available since PHP 5.3.0.

`SI_SIGIO` (`integer`)

- Available since PHP 5.3.0.

`SI_TKILL` (`integer`)

- Available since PHP 5.3.0.

`CLD_EXITED` (`integer`)

- Available since PHP 5.3.0.

`CLD_KILLED` (`integer`)

- Available since PHP 5.3.0.

`CLD_DUMPED` (`integer`)

- Available since PHP 5.3.0.

`CLD_TRAPPED` (`integer`)

- Available since PHP 5.3.0.

`CLD_STOPPED` (`integer`)

- Available since PHP 5.3.0.

`CLD_CONTINUED` (`integer`)

- Available since PHP 5.3.0.

`TRAP_BRKPT` (`integer`)

- Available since PHP 5.3.0.

`TRAP_TRACE` (`integer`)

- Available since PHP 5.3.0.

`POLL_IN` (`integer`)

- Available since PHP 5.3.0.

`POLL_OUT` (`integer`)

- Available since PHP 5.3.0.

`POLL_MSG` (`integer`)

- Available since PHP 5.3.0.

`POLL_ERR` (`integer`)

- Available since PHP 5.3.0.

`POLL_PRI` (`integer`)

- Available since PHP 5.3.0.

`POLL_HUP` (`integer`)

- Available since PHP 5.3.0.

`ILL_ILLOPC` (`integer`)

- Available since PHP 5.3.0.

`ILL_ILLOPN` (`integer`)

- Available since PHP 5.3.0.

`ILL_ILLADR` (`integer`)

- Available since PHP 5.3.0.

`ILL_ILLTRP` (`integer`)

- Available since PHP 5.3.0.

`ILL_PRVOPC` (`integer`)

- Available since PHP 5.3.0.

`ILL_PRVREG` (`integer`)

- Available since PHP 5.3.0.

`ILL_COPROC` (`integer`)

- Available since PHP 5.3.0.

`ILL_BADSTK` (`integer`)

- Available since PHP 5.3.0.

`FPE_INTDIV` (`integer`)

- Available since PHP 5.3.0.

`FPE_INTOVF` (`integer`)

- Available since PHP 5.3.0.

`FPE_FLTDIV` (`integer`)

- Available since PHP 5.3.0.

`FPE_FLTOVF` (`integer`)

- Available since PHP 5.3.0.

`FPE_FLTUND` (`integer`)

- Available since PHP 5.3.0.

`FPE_FLTRES` (`integer`)

- Available since PHP 5.3.0.

`FPE_FLTINV` (`integer`)

- Available since PHP 5.3.0.

`FPE_FLTSUB` (`integer`)

- Available since PHP 5.3.0.

`SEGV_MAPERR` (`integer`)

- Available since PHP 5.3.0.

`SEGV_ACCERR` (`integer`)

- Available since PHP 5.3.0.

`BUS_ADRALN` (`integer`)

- Available since PHP 5.3.0.

`BUS_ADRERR` (`integer`)

- Available since PHP 5.3.0.

`BUS_OBJERR` (`integer`)

- Available since PHP 5.3.0.