note 51692 added to function.trim

What value does function trim() return, if we call it with variable, which is not defined? On my system (Linux-Debian) it returns empty string, but what about Windows? ---- Manual Page -- http://www.php.net/manual/en/function.trim.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+51692 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+51692&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+51692&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+51692&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+51692&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+51692&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+51692&report=yes Search -- http://master.php.net/manage/user-notes.php