note 91863 added to function.func-num-args

This function comes in handy, and I believe is the only solution, when you have an optional parameter that can take any type of data. For example: <?php // $data can be of any type, including null function my_function($name, $data = null) { if ($data !== null) { // Do something with $data // If you call my_function('something'), this WILL NOT be reached // If you call my_function('something', null), this WILL NOT be reached } } ?> The problem with the above function is that you will never be able to use null as the value for $data. To fix this, use func_num_args() like so: <?php // $data can be of any type, including null function my_function($name, $data = null) { if (func_num_args() >= 2) { // Do something with $data // If you call my_function('something'), this WILL NOT be reached // If you call my_function('something', null), this WILL be reached } } ?> This solution works because func_num_args() reports exactly how many arguments were passed when the function was called. It does not take into account when default argument values are used. ---- Server IP: 209.41.74.194 Probable Submitter: 99.246.63.51 ---- Manual Page -- http://www.php.net/manual/en/function.func-num-args.php Edit -- https://master.php.net/note/edit/91863 Del: integrated -- https://master.php.net/note/delete/91863/integrated Del: useless -- https://master.php.net/note/delete/91863/useless Del: bad code -- https://master.php.net/note/delete/91863/bad+code Del: spam -- https://master.php.net/note/delete/91863/spam Del: non-english -- https://master.php.net/note/delete/91863/non-english Del: in docs -- https://master.php.net/note/delete/91863/in+docs Del: other reasons-- https://master.php.net/note/delete/91863 Reject -- https://master.php.net/note/reject/91863 Search -- https://master.php.net/manage/user-notes.php