PHP CLI-一段时间后要求用户输入或执行操作 [英] PHP CLI - Ask for User Input or Perform Action after a Period of Time

问题描述

我正在尝试创建一个PHP脚本，要求用户选择一个选项：基本上像这样：

I am trying to create a PHP script, where I ask the user to select an option: Basically something like:

echo "Type number of your choice below:";

echo "  1. Perform Action 1";
echo "  2. Perform Action 2";
echo "  3. Perform Action 3 (Default)";

$menuchoice = read_stdin();

if ( $menuchoice == 1) {
    echo "You picked 1";
    }
elseif ( $menuchoice == 2) {
    echo "You picked 2";
    }
elseif ( $menuchoice == 3) {
    echo "You picked 3";
    }

这很不错，因为它可以根据用户输入执行某些操作。

This works nicely as one can perform certain actions based on user input.

但我想对此进行扩展，以便如果用户在5秒内未键入某些内容，则默认操作将自动运行而无需任何操作来自用户的进一步操作。

But I would like to expand this so that if the user does not type something within 5 seconds, the default action will run automatically without any further action from the user.

使用PHP完全可行吗...？不幸的是，我是这个主题的初学者。

Is this at all possible with PHP...? unfortunately I am a beginner on this subject.

任何指导都将不胜感激。

Any guidance is greatly appreciated.

谢谢，

Hernando

推荐答案

您可以使用 stream_select（） 为此。这里有一个例子。

You can use stream_select() for that. Here comes an example.

echo "input something ... (5 sec)\n";

// get file descriptor for stdin 
$fd = fopen('php://stdin', 'r');

// prepare arguments for stream_select()
$read = array($fd);
$write = $except = array(); // we don't care about this
$timeout = 5;

// wait for maximal 5 seconds for input
if(stream_select($read, $write, $except, $timeout)) {
    echo "you typed: " . fgets($fd) . PHP_EOL;
} else {
    echo "you typed nothing\n";
}

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