proc_terminate — Kills a process opened by proc_open
Signals a process (created using proc_open()) that it should terminate. proc_terminate() returns immediately and does not wait for the process to terminate.
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. However this is only possible with PHP 5.2.2 or newer, as previous versions destroyed the given process resource .
Returns the termination status of the process that was run.