Improve documentation and examples

Author: yadaiio

Diff for: README.md

@@ -1,6 +1,6 @@
 # clue/reactphp-shell
 
-[![CI status](https://github.com/clue/reactphp-shell/workflows/CI/badge.svg)](https://github.com/clue/reactphp-shell/actions)
+[![CI status](https://github.com/clue/reactphp-shell/actions/workflows/ci.yml/badge.svg)](https://github.com/clue/reactphp-shell/actions)
 [![installs on Packagist](https://img.shields.io/packagist/dt/clue/shell-react?color=blue&label=installs%20on%20Packagist)](https://packagist.org/packages/clue/shell-react)
 
 Run async commands within any interactive shell command, built on top of [ReactPHP](https://reactphp.org/).
@@ -13,57 +13,65 @@ Once [installed](#install), you can use the following code to run an interactive
 bash shell and issue some commands within:
 
 ```php
+<?php
+
+require __DIR__ . '/vendor/autoload.php';
+
 $launcher = new Clue\React\Shell\ProcessLauncher();
 
 $shell = $launcher->createDeferredShell('bash');
 
 $shell->execute('echo -n $USER')->then(function ($result) {
     var_dump('current user', $result);
+}, function (Exception $e) {
+    echo 'Error: ' . $e->getMessage() . PHP_EOL;
 });
 
 $shell->execute('env | sort | head -n10')->then(function ($env) {
     var_dump('env', $env);
+}, function (Exception $e) {
+    echo 'Error: ' . $e->getMessage() . PHP_EOL;
 });
 
 $shell->end();
 ```
 
-See also the [examples](examples):
+See also the [examples](examples/):
 
 * [Run shell commands within a bash shell](examples/bash.php)
 * [Run PHP code within an interactive PHP shell](examples/php.php)
 * [Run shell commands within a docker container](examples/docker.php)
 
 ## Install
 
-The recommended way to install this library is [through Composer](https://getcomposer.org).
+The recommended way to install this library is [through Composer](https://getcomposer.org/).
 [New to Composer?](https://getcomposer.org/doc/00-intro.md)
 
 This will install the latest supported version:
 
 ```bash
-$ composer require clue/shell-react:^0.2
+composer require clue/shell-react:^0.2
 ```
 
 See also the [CHANGELOG](CHANGELOG.md) for details about version upgrades.
 
 This project aims to run on any platform and thus does not require any PHP
 extensions and supports running on legacy PHP 5.3 through current PHP 8+.
-It's *highly recommended to use PHP 7+* for this project.
+It's *highly recommended to use the latest supported PHP version* for this project.
 
 ## Tests
 
 To run the test suite, you first need to clone this repo and then install all
-dependencies [through Composer](https://getcomposer.org):
+dependencies [through Composer](https://getcomposer.org/):
 
 ```bash
-$ composer install
+composer install
 ```
 
 To run the test suite, go to the project root and run:
 
 ```bash
-$ php vendor/bin/phpunit
+vendor/bin/phpunit
 ```
 
 ## License

Diff for: examples/bash.php

@@ -1,19 +1,21 @@
 <?php
 
-use Clue\React\Shell\ProcessLauncher;
-
 require __DIR__ . '/../vendor/autoload.php';
 
-$launcher = new ProcessLauncher();
+$launcher = new Clue\React\Shell\ProcessLauncher();
 
 $shell = $launcher->createDeferredShell('bash 2>&1');
 
 $shell->execute('echo -n $USER')->then(function ($result) {
     var_dump('current user', $result);
+}, function (Exception $e) {
+    echo 'Error: ' . $e->getMessage() . PHP_EOL;
 });
 
 $shell->execute('env | sort | head -n10')->then(function ($env) {
     var_dump('env', $env);
+}, function (Exception $e) {
+    echo 'Error: ' . $e->getMessage() . PHP_EOL;
 });
 
 $shell->end();

Diff for: examples/docker.php

@@ -1,19 +1,21 @@
 <?php
 
-use Clue\React\Shell\ProcessLauncher;
-
 require __DIR__ . '/../vendor/autoload.php';
 
-$launcher = new ProcessLauncher();
+$launcher = new Clue\React\Shell\ProcessLauncher();
 
 $shell = $launcher->createDeferredShell('docker run -i --rm debian bash');
 
 $shell->execute('id')->then(function ($result) {
     var_dump('current user', $result);
+}, function (Exception $e) {
+    echo 'Error: ' . $e->getMessage() . PHP_EOL;
 });
 
 $shell->execute('env')->then(function ($env) {
     var_dump('env', $env);
+}, function (Exception $e) {
+    echo 'Error: ' . $e->getMessage() . PHP_EOL;
 });
 
 $shell->end();

Diff for: examples/php.php

@@ -1,10 +1,8 @@
 <?php
 
-use Clue\React\Shell\ProcessLauncher;
-
 require __DIR__ . '/../vendor/autoload.php';
 
-$launcher = new ProcessLauncher();
+$launcher = new Clue\React\Shell\ProcessLauncher();
 
 $shell = $launcher->createDeferredShell('php -a');
 $shell->setBounding("echo '{{ bounding }}';");