1--TEST-- 2Defining and using constants 3--FILE-- 4<?php 5 6define('foo', 2); 7define('1', 2); 8define(1, 2); 9define('', 1); 10define('1foo', 3); 11 12var_dump(constant('foo')); 13var_dump(constant('1')); 14var_dump(constant(1)); 15var_dump(constant('')); 16var_dump(constant('1foo')); 17 18?> 19--EXPECTF-- 20Notice: Constant 1 already defined in %s on line %d 21int(2) 22int(2) 23int(2) 24int(1) 25int(3) 26