basic website, basic templating

src/Service/Template.php

@@ -0,0 +1,40 @@
+<?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;
+    }
+}