Add evaluation order test

Author: nikic

Zend/tests/constexpr/evaluation_order.phpt

@@ -0,0 +1,45 @@
+--TEST--
+Evaluation order of initializers in class declaration
+--FILE--
+<?php
+
+class Order {
+    public function __construct(int $i) {
+        echo "Creating $i\n";
+    }
+}
+
+class A {
+    const C1 = new Order(1);
+    public static $s1 = new Order(3);
+    public $p1 = new Order(10);
+    const C2 = new Order(2);
+    public static $s2 = new Order(4);
+    public $p2 = new Order(11);
+}
+class B extends A {
+    const C3 = new Order(5);
+    public static $s3 = new Order(6);
+    public $p3 = new Order(12);
+}
+
+echo "\n";
+new A;
+echo "\n";
+new B;
+
+?>
+--EXPECT--
+Creating 1
+Creating 2
+Creating 3
+Creating 4
+Creating 5
+Creating 6
+
+Creating 10
+Creating 11
+
+Creating 10
+Creating 11
+Creating 12