Php/docs/function.sapi-windows-generate-ctrl-event
sapi_windows_generate_ctrl_event
(PHP 7 >= 7.4.0)
sapi_windows_generate_ctrl_event — Send a CTRL event to another process
说明
sapi_windows_generate_ctrl_event
( int $event
[, int $pid
= 0
] ) : bool
Sends a CTRL event to another process in the same process group.
参数
event
- The
CTRL
even to send; eitherPHP_WINDOWS_EVENT_CTRL_C
orPHP_WINDOWS_EVENT_CTRL_BREAK
. pid
- The ID of the process to which to send the event to. If
0
is given, the event is sent to all processes of the process group.
返回值
成功时返回 true
, 或者在失败时返回 false
。
范例
Example #1 Basic sapi_windows_generate_ctrl_event() Usage
This example shows how to pass along CTRL+BREAK
events to a child
process. In this case the child process echoes I'm still alive
every second, until the user presses CTRL+BREAK
, what causes
only the child process to be terminated.
<?php// forward CTRL+BREAK events to the child processsapi_windows_set_ctrl_handler('sapi_windows_generate_ctrl_event');// create a child process which echoes every second$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