basic website, basic templating

src/Controller/AddressBook.php

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+<?php
+
+namespace App\Controller;
+
+use App\Service\Template;
+use stdClass;
+
+class AddressBook extends stdClass
+{
+    public function __construct(Template $template)
+    {
+        $template->render(templateName: 'index.tpl');
+    }
+}

src/Entity/AddressBookEntry.php

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+<?php
+
+namespace App\Entity;
+
+class AddressBookEntry
+{
+    public function __construct(
+        private int $userid,
+        private string $first,
+        private string $last,
+        private string $nick,
+    )
+    {
+        // empty body
+    }
+}

src/Entity/User.php

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+<?php
+
+namespace App\Entity;
+
+class User
+{
+    public function __construct(
+        private string $nick,
+        private string $password,
+        private string $first = '',
+        private string $last = '',
+        private int $id = 0
+    )
+        {
+            // empty body
+        }
+}

src/Service/Container.php

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+<?php
+
+namespace App\Service;
+
+use App\Controller\AddressBook;
+use Exception;
+use stdClass;
+
+class Container
+{
+    // no autowiring yet, maybe later, but it might fit for a demo
+
+    private Template $template;
+    private AddressBook $addressBook;
+
+    public function __construct()
+    {
+        $this->template = new Template(templateDir: dirname(path: __DIR__, levels: 2) . '/templates/');
+        $this->addressBook = new AddressBook(template: $this->template);
+    }
+
+
+    /**
+     * @throws Exception
+     */
+    public function get(string $class): stdClass
+    {
+        return match($class) {
+            'App\Controller\AddressBook' => $this->addressBook,
+            default => throw new Exception(message: "Missing class definition: $class")
+        };
+    }
+}

src/Service/Template.php

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+<?php
+
+namespace App\Service;
+
+use Exception;
+
+class Template
+{
+    public function __construct(private readonly string $templateDir)
+    {
+        // empty body
+    }
+
+    /**
+     * @throws Exception
+     */
+    public function render(string $templateName): void
+    {
+        $template = file_get_contents(filename: $this->templateDir . $templateName);
+
+        // search for includes
+        preg_match_all(pattern: '/{% include ?\'?(.*?)\'? ?%}/i', subject: $template, matches: $matches, flags: PREG_SET_ORDER);
+
+        foreach ($matches as $value) {
+            $token = $value[0];
+            $include = $this->templateDir . $value[1];
+            if (file_exists(filename: $include)) {
+                $replacement = file_get_contents(filename: $include);
+            } else {
+                throw new Exception(message: "Missing included file: $include");
+            }
+            $template = str_replace(search: $token, replace: $replacement, subject: $template);
+        }
+
+        // remove the original template code
+        $template = preg_replace(pattern: '/{% include ?\'?(.*?)\'? ?%}/i', replacement: '', subject: $template);
+
+        echo $template;
+    }
+}

src/bootstrap.php

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+<?php
+
+spl_autoload_register(callback: function($className) {
+    $prefix = 'App';
+    $baseDir = __DIR__;
+
+    $len = strlen(string: $prefix);
+    if (strncmp(string1: $prefix, string2: $className, length: $len) !== 0) {
+        return;
+    }
+    $realClassName = substr(string: $className, offset: $len);
+    $classLocation = $baseDir . str_replace(search: '\\', replace: '/', subject: $realClassName) . '.php';
+    if (file_exists(filename: $classLocation)) {
+        require $classLocation;
+    } else {
+        die("Invalid class: $className");
+    }
+});