readline_callback_read_char

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

readline_callback_read_char — 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

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

readline_callback_handler_install() - 初始化一个 readline 回调接口，然后终端输出提示信息并立即返回
readline_callback_handler_remove() - 移除上一个安装的回调函数句柄并且恢复终端设置

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User Contributed Notes 2 notes

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thflori ¶

3 years ago


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;

?>

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-1

Quis-NOZPAM- at omicidio-NOZPAM- dot nl ¶

15 years ago


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

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备份地址：http://www.lvesu.com/blog/php/function.readline-callback-read-char.php