note 58808 added to function.sort

When I tried the case insensitive sort <?php $array_var = Array("Cheery", "zap", "Banana", "apple", "Zing"); array_multisort((strtolower($array_var)), SORT_ASC, SORT_STRING, $array_var); ?> I got PHP Notice: Array to string conversion in ...\ex7.php on line 77 PHP Warning: array_multisort(): Argument #1 is expected to be an array or a sort flag in ...\ex7.php on line 77 I'm a newbie - can anybody comment on this? What is the significance of the () around strtolower($array_var)? I think it works using this line instead: array_multisort(array_map('strtolower', $array_var), SORT_ASC, SORT_STRING, $array_var); ---- Manual Page -- http://www.php.net/manual/en/function.sort.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+58808 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+58808&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+58808&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+58808&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+58808&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+58808&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+58808&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+58808&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+58808&report=yes Search -- http://master.php.net/manage/user-notes.php