1--TEST-- 2Persistent case insensitive and user defined constants 3--FILE-- 4<?php 5var_dump(ZEND_THREAD_safe); 6define("ZEND_THREAD_safe", 123); 7var_dump(ZEND_THREAD_safe); 8?> 9--EXPECTF-- 10Warning: Use of undefined constant ZEND_THREAD_safe - assumed 'ZEND_THREAD_safe' (this will throw an Error in a future version of PHP) in %s on line %d 11string(16) "ZEND_THREAD_safe" 12int(123) 13