note 107208 added to function.list

Although the warning claims of undefined behaviour, it's reasonably straightforward what happens. <?php $a = array(1, 2, 3); list($a, $b, $c) = $a; var_dump($a, $b, $c); // int(1) // int(2) // int(3) ?> Since list() works from right to left on the target variables, $a is replaced last, thus keeping the remaining array element values around long enough to populate $b and $c. <?php $a = array(1, 2, 3); list($c, $b, $a) = $a; var_dump($a, $b, $c); // int(3) // NULL // NULL ?> $a is populated first (remember, right to left) with the value 3 from itself. Since $a is no longer an array, list() is forced to substitute NULL values for $b and $c. This appears to be perfectly sensible, though there may be edge cases and other strange behaviour I'm unaware of. ---- Server IP: 216.235.13.26 Probable Submitter: 216.121.235.92 ---- Manual Page -- http://www.php.net/manual/en/function.list.php Edit -- https://master.php.net/note/edit/107208 Del: integrated -- https://master.php.net/note/delete/107208/integrated Del: useless -- https://master.php.net/note/delete/107208/useless Del: bad code -- https://master.php.net/note/delete/107208/bad+code Del: spam -- https://master.php.net/note/delete/107208/spam Del: non-english -- https://master.php.net/note/delete/107208/non-english Del: in docs -- https://master.php.net/note/delete/107208/in+docs Del: other reasons-- https://master.php.net/note/delete/107208 Reject -- https://master.php.net/note/reject/107208 Search -- https://master.php.net/manage/user-notes.php