sapi_windows_generate_ctrl_event()

(PHP 7 >= 7.4.0)

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

TheCTRLeven to send;eitherPHP_WINDOWS_EVENT_CTRL_CorPHP_WINDOWS_EVENT_CTRL_BREAK.

$pid

The ID of the process to which to send the event to.If0is 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

Basicsapi_windows_generate_ctrl_event()Usage

This example shows how to pass alongCTRL+BREAKevents to a child process. In this case the child process echoesI'm still aliveevery second, until the user pressesCTRL+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