Imported code from old repository

static/templates/mathdemo.txt

@@ -0,0 +1,30 @@
+<?php
+
+class MathDemo {
+
+    public function add($a, $b) {
+        return $a + $b;
+    }
+
+    public function substract($a, $b) {
+        return $a - $b;
+    }
+
+    public function multiply($a, $b) {
+        return $a * $b;
+    }
+
+    public function divide($a, $b) {
+        return $a / $b;
+    }
+
+}
+----
+<?xml version="1.0" encoding="UTF-8"?>
+<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+     xmlns:phpmae="coid://phpmae.dev/">
+
+    <phpmae:Class rdf:about="coid://playground.phpmae/MathDemo">
+    </phpmae:Class>
+
+</rdf:RDF>