Updated mu to be only 3 lines long

Author: jeremeamia

.gitignore

@@ -2,3 +2,4 @@ vendor
 composer.phar
 composer.lock
 .DS_Store
+*.log

README.md

@@ -1,8 +1,6 @@
 # The µ PHP Microframework
 
-[![Code Climate](https://codeclimate.com/github/jeremeamia/mu/badges/gpa.svg)](https://codeclimate.com/github/jeremeamia/mu)
-
-A _"real"_ microframework that fits in **just 4 lines of code**.
+A _"real"_ microframework that fits in **just 3 lines of code**.
 
 The "microframeworks" out there weren't _micro_ enough for me, so I brushed up on
 some of my code golfing skills to create **µ**.
@@ -11,34 +9,34 @@ some of my code golfing skills to create **µ**.
 
 ## Features
 
-These 4 LOC come jam-packed with features!
+These 3 LOC come jam-packed with features!
 
 ### Easy, regex-based routing system
 
 Follows the well-established route-to-callable microframework pattern.
 
 ```php
-echo (new µ)
-    ->get('/hello', function ($app) {
-        return "<p>Hello, world!</p>";
+(new µ)
+    ->get('/hello', function () {
+        echo "<p>Hello, world!</p>";
     })
     ->run();
 ```
 
 Allows you to access parameters from the URL.
 
 ```php
-echo (new µ)
+(new µ)
     ->get('/hello/(?<name>\w+)', function ($app, $params) {
-        return "<p>Hello, {$params['name']}!</p>";
+        echo "<p>Hello, {$params['name']}!</p>";
     })
     ->run();
 ```
 
 Supports all your favorite HTTP verbs.
 
 ```php
-echo (new µ)
+(new µ)
     ->delete('/user/(?<id>\d+)', $fn)
     ->get('/user/(?<id>\d+)', $fn)
     ->head('/user/(?<id>\d+)', $fn)
@@ -48,38 +46,32 @@ echo (new µ)
     ->run();
 ```
 
-Supports wildcard verbs too, because sometimes you are just making a web page
-and you really don't care about esoteric HTTP practices.
+### Simple dependency/config container
 
 ```php
-echo (new µ)
-    ->any('/', $fn)
-    ->run();
-```
-
-### Simple, but powerful, dependency injection container
-
-```php
-use Monolog\Logger;
 use Monolog\Handler\StreamHandler;
+use Monolog\Logger;
 
-echo (new µ)
+(new µ)
     ->cfg('log.channel', 'your-app')
-    ->cfg('log.handler', function ($app) {
-        return new StreamHandler('path/to/your.log', Logger::WARNING);
+    ->cfg('log.handler', function () {
+        return new StreamHandler('path/to/your.log', Logger::DEBUG);
     })
     ->cfg('log', function ($app) {
         $log = new Logger($app->cfg('log.channel'));
         $log->pushHandler($app->cfg('log.handler'));
         return $log;
     })
     ->get('/hello/(?<name>\w+)', function ($app, $params) {
-        $app->cfg('log')->addDebug("Said hello to {$params['name']}.");
-        return "<p>Hello, {$params['name']}!</p>";
+        $app->cfg('log')->debug("Said hello to {$params['name']}");
+        echo "<p>Hello, {$params['name']}!</p>";
     })
     ->run();
 ```
 
+If a callable is provided (like with `log.handler` above), then it is treated as a factory and is only called once to
+produce a singleton value for efficient, multiple accesses.
+
 ### A truly _elegant_ and fluent interface
 
 _See previous example (I'm lazy)._
@@ -102,40 +94,50 @@ Templates are just PHP files—no mustaches and no frills.
 
 ```php
 // index.php
-echo (new µ)
+(new µ)
     ->cfg('views', __DIR__ . '/templates')
-    ->any('/hello/(?<name>\w+)', function ($app, $params) {
-        return $app->view('hello', [
+    ->get('/hello/(?<name>\w+)', function ($app, $params) {
+        echo $app->view('hello', [
             'greeting' => 'howdy',
             'name'     => $params['name'],
         ]);
     })
     ->run();
 ```
 
-No twigs, plates, or blades to cut you or poke you.
+No Twigs, Plates, or Blades to cut you or poke you. That might feel a little _dull_, but it's simple.
 
 ## Design constraints
 
 * Must have at least a Router, Container, and Templating System as features.
 * Must attempt to incorporate usage patterns (e.g., chainable methods, closures
   as controllers) that resemble other contemporary microframeworks.
 * Must work with `error_reporting` set to `-1` (all errors reported).
-* Must not exceed 4 lines of code (LOC), where each line is <= 120 characters.
+* Must not exceed 3 lines of code (LOC), where each line is <= 120 characters.
 * Must not have dependencies on other packages.
-* May break traditional coding conventions for the sake of brevity.
-* Must be hand-written.
+* May break traditional coding conventions/styles for the sake of brevity.
+* Must be hand-written, not minified/obfuscated by any tools.
 
 ## It works, but it's really just a joke.
 
 Don't use this in production, or really anywhere. It's just for fun. :smile:
 
-If you want to use a production-quality _microframework_, try one of these:
+If you want to use a production-quality _microframework_, try [Slim](http://www.slimframework.com/).
 
-* [Slim](http://www.slimframework.com/)
-* [Lumen](http://lumen.laravel.com/)
-* Zend [Diactoros](https://docs.zendframework.com/zend-diactoros/) or [Expressive](https://docs.zendframework.com/zend-expressive/)
+## Examples
 
-## Is there a PHP 7 Version?
+The code examples in this README are also shipped as working examples in the `/examples` directory.
 
-Not yet. Waiting for 7.4 with shorthand closures before I attempt anything.
+To run an example, use the built-in PHP server.
+```bash
+# For the hello1 example:
+php -S localhost:8000 examples/hello1.php
+```
+Then access `http://localhost:8000` in your browser or via cURL.
+
+## Tests
+
+A very basic test suite is included, and can be run via:
+```bash
+php test.php
+```

composer.json

@@ -6,5 +6,11 @@
   "type": "project",
   "autoload": {
     "files": ["mu.php"]
+  },
+  "dependencies": {
+    "php": ">=7.0"
+  },
+  "require-dev": {
+    "monolog/monolog": "^2.2"
   }
-}
+}

examples/hello1.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+require __DIR__ . '/../vendor/autoload.php';
+
+(new µ)
+    ->get('/hello', function () {
+        echo "<p>Hello, world!</p>";
+    })
+    ->run();

examples/hello2.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+require __DIR__ . '/../vendor/autoload.php';
+
+(new µ)
+    ->get('/hello/(?<name>\w+)', function ($app, $params) {
+        echo "<p>Hello, {$params['name']}!</p>";
+    })
+    ->run();

examples/hello3.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+use Monolog\Handler\StreamHandler;
+use Monolog\Logger;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+(new µ)
+    ->cfg('log.channel', 'hello3')
+    ->cfg('log.handler', function () {
+        return new StreamHandler(__DIR__ . '/hello3.log', Logger::DEBUG);
+    })
+    ->cfg('log', function ($app) {
+        $log = new Logger($app->cfg('log.channel'));
+        $log->pushHandler($app->cfg('log.handler'));
+        return $log;
+    })
+    ->get('/hello/(?<name>\w+)', function ($app, $params) {
+        $app->cfg('log')->debug("Said hello to {$params['name']}");
+        echo "<p>Hello, {$params['name']}!</p>";
+    })
+    ->run();

examples/hello4.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+require __DIR__ . '/../vendor/autoload.php';
+
+(new µ)
+    ->cfg('views', __DIR__ . '/templates')
+    ->get('/hello/(?<name>\w+)', function ($app, $params) {
+        echo $app->view('hello4', [
+            'greeting' => 'howdy',
+            'name'     => $params['name'],
+        ]);
+    })
+    ->run();

examples/templates/hello4.php

@@ -0,0 +1,8 @@
+<html>
+<head>
+    <title>World Greeter</title>
+</head>
+<body>
+<p><?= ucfirst($greeting) ?>, <?= $name ?>!</p>
+</body>
+</html>

examples/verbs.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$fn = function () {
+    header('X-Test: Hello!', true, 200);
+    if ($_SERVER['REQUEST_METHOD'] !== 'HEAD') {
+        echo <<<HTML
+            <ul>
+                <li>Method: {$_SERVER['REQUEST_METHOD']}</li>
+                <li>URI: {$_SERVER['REQUEST_URI']}</li>
+            </ul>
+        HTML;
+    }
+};
+
+(new µ)
+    ->delete('/user/(?<id>\d+)', $fn)
+    ->get('/user/(?<id>\d+)', $fn)
+    ->head('/user/(?<id>\d+)', $fn)
+    ->patch('/user/(?<id>\d+)', $fn)
+    ->post('/users', $fn)
+    ->put('/user/(?<id>\d+)', $fn)
+    ->run();

mu.php

@@ -1,4 +1,3 @@
-<?php class µ{function cfg($k,$v=null){$c=&$this->$k;if($v===null)return$c=is_callable($c)?$c($this):$c;$c=$v;return
-$this;}function __call($m,$a){$this->{($m=='any'?'':$m).$a[0]}=$a[1];return$this;}function run(){foreach($this as$x=>$f)
-if(preg_match("@$x@i","$_SERVER[REQUEST_METHOD]$_SERVER[REQUEST_URI]",$p))return$f($this,$p);}function view($f,$d=[]){
-ob_start();extract($d);require"$this->views/$f.php";return ob_get_clean();}}
+<?php class µ{function __call($m,$a){$c=&$this->{$m.$a[0]};$c=$a[1]??(is_callable($c)?$c($this):$c);return isset($a[1])?
+$this:$c;}function run(){foreach($this as$x=>$f)preg_match("@$x@i","$_SERVER[REQUEST_METHOD]$_SERVER[REQUEST_URI]",$p)&&
+$f($this,$p);}function view($f,$d=[]){ob_start();extract($d);require"$this->cfgviews/$f.php";return ob_get_clean();}}