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  • readline_callback_read_char()

    (PHP 5 >= 5.1.0, PHP 7)

    当一个行被接收时读取一个字符并且通知 readline 调用回调函数

    说明

    readline_callback_read_char(void): void

    读取用户输入中的一个字符.当一行被接收时,这个函数将通知 readline 调用使用readline_callback_handler_install()安装的回调函数接口,并且这一个行已经准备输入.

    返回值

    没有返回值。

    范例

    See readline_callback_handler_install() for an example of how to use the readline callback interface.

    参见

    It seems this function is not blocking anymore:
    <?php
    do {
     readline_callback_read_char();
     $str = readline_info('line_buffer');
     echo '.';
    } while (strlen($str) < 10);
    echo PHP_EOL . $str . PHP_EOL;
    ?>
    
    Note that this function is blocking if there is no character to read
    If you don`t want to get blocked, you should use the trick with stream_select()
    It also only reads one char per call,
    So if something else in your script is blocking,
    you`ve got a problem