sapi_windows_generate_ctrl_event
(PHP 7 >= 7.4.0, PHP 8)
sapi_windows_generate_ctrl_event — Send a CTRL event to another process
Description
$event
, int $pid
= 0): boolSends a CTRL event to another process in the same process group.
Parameters
-
event
-
The
CTRL
even to send; eitherPHP_WINDOWS_EVENT_CTRL_C
orPHP_WINDOWS_EVENT_CTRL_BREAK
. -
pid
-
The ID of the process to which to send the event to. If
0
is given, the event is sent to all processes of the process group.
Return Values
Returns true
on success or false
on failure.
Examples
Example #1 Basic sapi_windows_generate_ctrl_event() Usage
This example shows how to pass along CTRL+BREAK
events to a child
process. In this case the child process echoes I'm still alive
every second, until the user presses CTRL+BREAK
, what causes
only the child process to be terminated.
<?php
// forward CTRL+BREAK events to the child process
sapi_windows_set_ctrl_handler('sapi_windows_generate_ctrl_event');
// create a child process which echoes every second
$cmd = ['php', '-r', 'while (true) { echo "I\'m still alive\n"; sleep(1); }'];
$descspec = array(['pipe', 'r'], ['pipe', 'w'], ['pipe', 'w']);
$options = ['create_process_group' => true];
$proc = proc_open($cmd, $descspec, $pipes, null, null, $options);
while (true) {
echo fgets($pipes[1]);
}
?>
See Also
- proc_open() - Execute a command and open file pointers for input/output
- sapi_windows_set_ctrl_handler() - Set or remove a CTRL event handler