note 113307 added to function.array-filter

Read "callback" parameter note with understanding (as well as "converting to boolean" chapter). Keep in midn, that 0, both: * integer: 0 and * float: 0.00 evaluates to boolean FALSE! And therefore all array nodes, that have such value WILL ALSO BE FILTERED by array_filter(), with default call back. Unless you provide your own callback function, that will (for example) filter only empty strings and NULLs, but leave "zeros" untouched. Some people (including me) might be surprised to find this out. ---- Server IP: 69.147.83.199 Probable Submitter: 155.158.96.28 ---- Manual Page -- http://php.net/manual/en/function.array-filter.php Edit -- https://master.php.net/note/edit/113307 Del: integrated -- https://master.php.net/note/delete/113307/integrated Del: useless -- https://master.php.net/note/delete/113307/useless Del: bad code -- https://master.php.net/note/delete/113307/bad+code Del: spam -- https://master.php.net/note/delete/113307/spam Del: non-english -- https://master.php.net/note/delete/113307/non-english Del: in docs -- https://master.php.net/note/delete/113307/in+docs Del: other reasons-- https://master.php.net/note/delete/113307 Reject -- https://master.php.net/note/reject/113307 Search -- https://master.php.net/manage/user-notes.php