note 105935 added to iterator.valid
| From: | hyponiq at gmail dot com | Date: | Mon, 26 Sep 2011 23:12:13 +0000 |
| Subject: | note 105935 added to iterator.valid | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-183459@lists.php.net to get a copy of this message | ||
Take consideration when utilizing this method and using the returned value of isset([value]). The
value of isset([value]) will be false for null values.
I ran into this problem when checking isset([value]) against array elements whose value was null.
Example:
<?php
$array = array(null, 1, 2, 3);
$isSet = isset($array[0]);
var_dump($isSet); // output: boolean(false)
class AClass {
public $array = (null, 1, 2, 3);
function valid() {
return isset($this->array[0]);
}
}
$class = new AClass;
var_dump($class->valid()); // output: boolean(false)
?>
----
Server IP: 69.147.83.197
Probable Submitter: 69.73.113.128
----
Manual Page -- http://www.php.net/manual/en/iterator.valid.php
Edit -- https://master.php.net/note/edit/105935
Del: integrated -- https://master.php.net/note/delete/105935/integrated
Del: useless -- https://master.php.net/note/delete/105935/useless
Del: bad code -- https://master.php.net/note/delete/105935/bad+code
Del: spam -- https://master.php.net/note/delete/105935/spam
Del: non-english -- https://master.php.net/note/delete/105935/non-english
Del: in docs -- https://master.php.net/note/delete/105935/in+docs
Del: other reasons-- https://master.php.net/note/delete/105935
Reject -- https://master.php.net/note/reject/105935
Search -- https://master.php.net/manage/user-notes.php