sapi_windows_generate_ctrl_event

(PHP 7 >= 7.4.0, PHP 8)

sapi_windows_generate_ctrl_event — Send a CTRL event to another process

说明

sapi_windows_generate_ctrl_event ( int $event , int $pid = 0 ) : bool

Sends a CTRL event to another process in the same process group.

参数

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.

返回值

成功时返回 true，或者在失败时返回 false。

范例

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]);
}
?>

参见

proc_open() - 执行一个命令，并且打开用来输入/输出的文件指针。
sapi_windows_set_ctrl_handler() - Set or remove a CTRL event handler

User Contributed Notes

Michael Q 22-Mar-2021 12:05


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.