Process builtins

Process builtins

Function	Signature	Returns
die()	(int $status): void	void
exec()	(string $command): string	string
exit()	(int $status): void	void
passthru()	(string $command): void	void
pclose()	(resource $handle): int	int
popen()	(string $command, string $mode): mixed	mixed
readline()	(string $prompt = null): mixed	mixed
shell_exec()	(string $command): string	string
sleep()	(int $seconds): int	int
system()	(string $command): string	string
usleep()	(int $microseconds): void	void