1--TEST-- 2Testing several valid and invalid parameters 3--FILE-- 4<?php 5 6class foo { 7 8} 9 10var_dump(class_exists('')); 11var_dump(class_exists(NULL)); 12var_dump(class_exists('FOO')); 13var_dump(class_exists('bar')); 14var_dump(class_exists(1)); 15var_dump(class_exists(new stdClass)); 16 17?> 18--EXPECTF-- 19bool(false) 20bool(false) 21bool(true) 22bool(false) 23bool(false) 24 25Warning: class_exists() expects parameter 1 to be string, object given in %s on line %d 26NULL 27