(PHP 7 >= 7.4.0, PHP 8)
sapi_windows_generate_ctrl_event — Send a CTRL event to another process
$event
, int $pid = 0
) : boolSends a CTRL event to another process in the same process group.
event
The CTRL even to send;
either PHP_WINDOWS_EVENT_CTRL_C
or PHP_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.
成功时返回 true， 或者在失败时返回 false。
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]);
}
?>
This function may produce a Warning:
sapi_windows_set_ctrl_handler(): CTRL events trapping is only supported on console in script.php..
It happens when script is started by "php-cgi.exe", so "php.exe -q" should be used instead.
While pressing CTRL+C don't expect the handler to run instantly, i've ran some curl request in a loop and found that handler runs when either response arrives or request finishes by timeout.