Add example which removes any control codes from input

Author: clue

examples/remove-codes.php

@@ -0,0 +1,41 @@
+<?php
+
+// this simple example reads from STDIN, removes ALL codes and then prints to STDOUT.
+// you can run this example and notice that special keys will be filtered out:
+// $ php remove-codes.php
+//
+// you can also pipe the output of other commands into this to remove any control
+// codes like this:
+// $ phpunit --color=always | php remove-codes.php
+
+use React\Stream\Stream;
+use React\EventLoop\Factory;
+use Clue\React\Term\ControlCodeParser;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$loop = Factory::create();
+
+if (function_exists('posix_isatty') && posix_isatty(STDIN)) {
+    // Disable icanon (so we can fread each keypress) and echo (we'll do echoing here instead)
+    shell_exec('stty -icanon -echo');
+}
+
+// process control codes from STDIN
+$stdin = new Stream(STDIN, $loop);
+$parser = new ControlCodeParser($stdin);
+
+$stdout = new Stream(STDOUT, $loop);
+$stdout->pause();
+
+// pipe data from STDIN to STDOUT without any codes
+$parser->pipe($stdout);
+
+// only forward \r, \n and \t
+$parser->on('c0', function ($code) use ($stdout) {
+    if ($code === "\n" || $code === "\r" || $code === "\t") {
+        $stdout->write($code);
+    }
+});
+
+$loop->run();