Change the way to ensure the constant is defined at runtime in a test-case

Author: sj-i

Zend/tests/traits/constant_016.phpt

@@ -1,13 +1,14 @@
 --TEST--
 Compatibility of values of same name trait constants is checked after their constant expressions are evaluated
+--ENV--
+ENSURE_CONSTANT_IS_DEFINED_AT_RUNTIME=1
 --FILE--
 <?php
 
 // Ensure CONSTANT is defined at runtime
-function define_constant(): void {
-    eval("define('CONSTANT', 2);");
+if ($_ENV['ENSURE_CONSTANT_IS_DEFINED_AT_RUNTIME']) {
+    define('CONSTANT', 2);
 }
-define_constant();
 
 trait TestTrait {
   public const Constant = 40 + CONSTANT;