note 68494 added to function.each
| From: | Michael at osu1 dot php dot net | Date: | Sat, 29 Jul 2006 20:02:15 +0000 |
| Subject: | note 68494 added to function.each | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-115331@lists.php.net to get a copy of this message | ||
Something that I found useful to note is that each() does NOT return a reference to the array
contets, but a copy of the item.
So, say you have:
$boxes = Array();
$boxes["Large"] = Array();
$boxes["Medium"] = Array();
$boxes["Small"] = Array();
and want to put the small box inside the medium box inside the large box, doing:
$lastBox = NULL;
while (list($key, $box) = each($boxes)) {
if (isset($lastBox))
$lastBox[0] =& $box;
$lastBox =& $box;
}
will not work. Instead, you have to use the key like:
$lastBox = NULL;
while (list($key) = each($boxes)) {
$box =& $boxes[$key];
if (isset($lastBox))
$lastBox[0] =& $box;
$lastBox =& $box;
}
which will work.
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Manual Page -- http://www.php.net/manual/en/function.each.php
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