add pattern Interpreter

Behavioral/Interpreter/AndExp.php

@@ -0,0 +1,20 @@
+<?php declare(strict_types=1);
+
+namespace DesignPatterns\Behavioral\Interpreter;
+
+class AndExp extends AbstractExp
+{
+    private AbstractExp $first;
+    private AbstractExp $second;
+
+    public function __construct(AbstractExp $first, AbstractExp $second)
+    {
+        $this->first = $first;
+        $this->second = $second;
+    }
+
+    public function interpret(Context $context): bool
+    {
+        return (bool) $this->first->interpret($context) && $this->second->interpret($context);
+    }
+}