php-shell/examples/commandevents.php

<?php
/*
 *  This example demonstrates how to use events to catch commands that
 *  have not been handled by any context or builtin.
 *
 */

require_once __DIR__."/../vendor/autoload.php";

use NoccyLabs\Shell\Shell;
use NoccyLabs\Shell\Style;
use NoccyLabs\Shell\Context;

$myShell = new Shell();

// Add a listeners for various command aspects
$myShell->addListener(Shell::EVT_BAD_COMMAND, function ($e) {
    echo "EVT_BAD_COMMAND:\n";
    printf("| command: %s\n", $e->command);
    printf("|_args: %s\n", join(" ",$e->args));
});
$myShell->addListener(Shell::EVT_BEFORE_COMMAND, function ($e) {
    echo "EVT_BEFORE_COMMAND:\n";
    printf("| command: %s\n", $e->command);
    printf("|_args: %s\n", join(" ",$e->args));
});
$myShell->addListener(Shell::EVT_AFTER_COMMAND, function ($e) {
    echo "EVT_AFTER_COMMAND:\n";
    printf("| command: %s\n", $e->command);
    printf("| args: %s\n", join(" ",$e->args));
    printf("|_type: %s\n", $e->type);
});

// Set the initial prompt, not really needed.
$myShell->setPrompt("test>");

// Create an anonymous context and add a command
$ctx = $myShell->createContext("root");
$ctx->addCommand("hello", function ($who="World") {
    echo "Hello {$who}!\n";
}, [ "help"=>"Say hello", "args"=>"who" ]);

// Run the shell
$myShell->run();