<?php
//stdin.php
error_reporting(E_ALL);
$context = stream_context_create(array());
$fp = fopen('php://stdin', 'r', false, $context);
stream_set_blocking($fp, 0);
var_dump($fp);

while (true) 
{
    $read = array($fp);
    if (false === ($num_changed_streams = @stream_select($read, $w=null, $e=null, 0))) {
    } elseif ($num_changed_streams > 0) {
        echo ".";
        echo fgets($fp);
    }
    usleep(100);
}

?>