leo4all · October 10, 2018 19:29 · Oct 10, 2018
diff --git a/MetaTrait.php b/MetaTrait.php
@@ -0,0 +1,45 @@
+<?php
+trait MetaTrait
+{
+
+    private $methods = array();
+
+    public function addMethod($methodName, $methodCallable)
+    {
+        if (!is_callable($methodCallable)) {
+            throw new InvalidArgumentException('Second param must be callable');
+        }
+        $this->methods[$methodName] = Closure::bind($methodCallable, $this, get_class());
+    }
+
+    public function __call($methodName, array $args)
+    {
+        if (isset($this->methods[$methodName])) {
+            return call_user_func_array($this->methods[$methodName], $args);
+        }
+
+        throw RunTimeException('There is no method with the given name to call');
+    }
+
+}
+?>
+
+test.php
+<?php
+require 'MetaTrait.php';
+
+class HackThursday {
+    use MetaTrait;
+
+    private $dayOfWeek = 'Thursday';
+
+}
+
+$test = new HackThursday();
+$test->addMethod('when', function () {
+    return $this->dayOfWeek;
+});
+
+echo $test->when();
+
+?>