note 110099 added to control-structures.foreach

If you need to create an empty array before a foreach loop, for example because you're looping through a set of database results and a result array is necessary to be filled up with modified/filtered entries based on the database results, you could do this: <?php $results = array(); foreach($dbset as $entry) { // Do something here. $results[] = $something } ?> But if you care not for slightly less human-readable code, you could also write this in one line thanks to the ternary operator (PHP >= 5.3): <?php foreach(($results = array()) ?: $dbset as $entry) { // Do something here. $results[] = $something } ?> Or (PHP < 5.3): <?php foreach(($results = array()) ?0: $dbset as $entry) { // Do something here. $results[] = $something } ?> This works firstly because foreach expects an array_expression before the as keyword, rather than a variable, and secondly because an empty array evaluates to false, thus the second half of the ternary statement is returned, which is the array to loop over. And because this expression is only evaluated once to produce the array to loop over, the results array is not cleared every iteration. Don't forget the parentheses around the assignment statement! This works for every language construct that expects expressions. ---- Server IP: 83.137.20.135 Probable Submitter: 87.195.224.218 ---- Manual Page -- http://www.php.net/manual/en/control-structures.foreach.php Edit -- https://master.php.net/note/edit/110099 Del: integrated -- https://master.php.net/note/delete/110099/integrated Del: useless -- https://master.php.net/note/delete/110099/useless Del: bad code -- https://master.php.net/note/delete/110099/bad+code Del: spam -- https://master.php.net/note/delete/110099/spam Del: non-english -- https://master.php.net/note/delete/110099/non-english Del: in docs -- https://master.php.net/note/delete/110099/in+docs Del: other reasons-- https://master.php.net/note/delete/110099 Reject -- https://master.php.net/note/reject/110099 Search -- https://master.php.net/manage/user-notes.php