Please note that this method doesn't exist in the Windows version of readline. That's not a PHP issue, but an upstream issue in the WinEdit/Readline library that has yet to implement it.
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
readline_callback_read_char — Lê um caractere e informa a interface de chamada de retorno de readline quando uma linha é recebida
Lê um caractere de entrada do usuário. Quando uma linha é recebida, esta função informa a interface de chamada de retorno de readline, instalada usando readline_callback_handler_install(), que uma linha está pronta para entrada.
Esta função não possui parâmetros.
Nenhum valor é retornado.
Consulte readline_callback_handler_install() para um exemplo de como usar a interface de chamada de retorno de readline.
Please note that this method doesn't exist in the Windows version of readline. That's not a PHP issue, but an upstream issue in the WinEdit/Readline library that has yet to implement it.It seems this function is not blocking anymore:<?phpdo { 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 readIf 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