readline_callback_read_char
(PHP 5 >= 5.1.0, PHP 7)
readline_callback_read_char — Reads a character and informs the readline callback interface when a line is received
Описание
void readline_callback_read_char
( void
)
Reads a character of user input. When a line is received, this function informs the readline callback interface installed using readline_callback_handler_install() that a line is ready for input.
Возвращаемые значения
Эта функция не возвращает значения после выполнения.
Примеры
See readline_callback_handler_install() for an example of how to use the readline callback interface.
Смотрите также
- readline_callback_handler_install() - Initializes the readline callback interface and terminal, prints the prompt and returns immediately
- readline_callback_handler_remove() - Removes a previously installed callback handler and restores terminal settings
Коментарии
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
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;
?>