note 97897 added to function.call-user-func

Further to Maxdamantus's comment, this is another example of what works and what doesn't when some of the parameters are expected to be passed by reference: <?php $alphabet = array( 'a' => 'alpha', 'b' => 'beta', ); function add_letter(&$a, $roman, $greek_name) { $a[$roman] = $greek_name; } // Gives warning and doesn't work call_user_func('add_letter', $alphabet, 'c', 'gamma'); print_r($alphabet); // Works call_user_func('add_letter', &$alphabet, 'd', 'delta'); print_r($alphabet); // Works $func_name = 'add_letter'; $func_name($alphabet, 'e', 'epsilon'); print_r($alphabet); ?> ---- Server IP: 69.147.83.197 Probable Submitter: 94.193.96.179 ---- Manual Page -- http://www.php.net/manual/en/function.call-user-func.php Edit -- https://master.php.net/note/edit/97897 Del: integrated -- https://master.php.net/note/delete/97897/integrated Del: useless -- https://master.php.net/note/delete/97897/useless Del: bad code -- https://master.php.net/note/delete/97897/bad+code Del: spam -- https://master.php.net/note/delete/97897/spam Del: non-english -- https://master.php.net/note/delete/97897/non-english Del: in docs -- https://master.php.net/note/delete/97897/in+docs Del: other reasons-- https://master.php.net/note/delete/97897 Reject -- https://master.php.net/note/reject/97897 Search -- https://master.php.net/manage/user-notes.php