proc_terminate kills a process opened by proc_open intproc_terminate resourceprocess intsignal Signals a process (created using proc_open) that it should terminate. proc_terminate returns immediately and does not wait for the process to terminate. The optional signal is only useful on POSIX operating systems; you may specify a signal to send to the process using the kill(2) system call. The default is SIGTERM. proc_terminate allows you terminate the process and continue with other tasks. You may poll the process (to see if it has stopped yet) by using the proc_get_status function. See also proc_open, proc_close, and proc_get_status.