note 130638 added to function.class-exists

Beware that class_exists is a runtime check and not a compile time check! This means that even if the class is defined after the class_exists, it will return true! <?php echo 'Does class "MyClass" exist? : ', class_exists('MyClass') ? 'YES' : 'NO'; class MyClass { } ?> Output: YES ---- Server IP: 206.189.2.9 Probable Submitter: 95.98.156.14 ---- Manual Page -- https://php.net/manual/en/function.class-exists.php Edit -- https://main.php.net/note/edit/130638 Del: integrated -- https://main.php.net/note/delete/130638/integrated Del: useless -- https://main.php.net/note/delete/130638/useless Del: bad code -- https://main.php.net/note/delete/130638/bad+code Del: spam -- https://main.php.net/note/delete/130638/spam Del: non-english -- https://main.php.net/note/delete/130638/non-english Del: in docs -- https://main.php.net/note/delete/130638/in+docs Del: other reasons-- https://main.php.net/note/delete/130638 Reject -- https://main.php.net/note/reject/130638 Search -- https://main.php.net/manage/user-notes.php