expect_popen
Introduction
Process Control Extensions
PHP Manual

# Process Control

- Introduction
- Installing/Configuring
  - Installation
  - Runtime Configuration
  - Resource Types
- Predefined Constants
- Examples
- PCNTL Functions
  - pcntl_alarm — Set an alarm clock for delivery of a signal
  - pcntl_exec — Executes specified program in current process space
  - pcntl_fork — Forks the currently running process
  - pcntl_getpriority — Get the priority of any process
  - pcntl_setpriority — Change the priority of any process
  - pcntl_signal — Installs a signal handler
  - pcntl_wait — Waits on or returns the status of a forked child
  - pcntl_waitpid — Waits on or returns the status of a forked child
  - pcntl_wexitstatus — Returns the return code of a terminated child
  - pcntl_wifexited — Checks if status code represents a normal exit
  - pcntl_wifsignaled — Checks whether the status code represents a termination due to a signal
  - pcntl_wifstopped — Checks whether the child process is currently stopped
  - pcntl_wstopsig — Returns the signal which caused the child to stop
  - pcntl_wtermsig — Returns the signal which caused the child to terminate

expect_popen
Introduction
Process Control Extensions
PHP Manual