note 91482 added to language.pseudo-types

I noticed two important thing about putting callbacks into an arg list when calling a function: 1. The function to which the callback refers must be defined earlier in the source stream. So for example: function main() {...; usort($array, 'sortfunction'); ... } function sortfunction($a, $b){ return 0; } Will NOT work, but this will: function sortfunction($a, $b){ return 0; } function main() {...; usort($array, 'sortfunction'); ... } 2. It's not really just a string. For example, this doesn't work: usort($array, ($reverse?'reversesorter':'forwardsorter')); I found these two discoveries quite counterintuitive. ---- Server IP: 64.71.164.2 Probable Submitter: 70.231.134.116 ---- Manual Page -- http://www.php.net/manual/en/language.pseudo-types.php Edit -- https://master.php.net/note/edit/91482 Del: integrated -- https://master.php.net/note/delete/91482/integrated Del: useless -- https://master.php.net/note/delete/91482/useless Del: bad code -- https://master.php.net/note/delete/91482/bad+code Del: spam -- https://master.php.net/note/delete/91482/spam Del: non-english -- https://master.php.net/note/delete/91482/non-english Del: in docs -- https://master.php.net/note/delete/91482/in+docs Del: other reasons-- https://master.php.net/note/delete/91482 Reject -- https://master.php.net/note/reject/91482 Search -- https://master.php.net/manage/user-notes.php