note 59152 added to function.extract
| From: | Csaba at alum dot mit dot edu | Date: | Sun, 27 Nov 2005 19:41:22 +0000 |
| Subject: | note 59152 added to function.extract | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-99204@lists.php.net to get a copy of this message | ||
Sometimes you may want to extract only a named subset of the key/value pairs in an array. This
keeps things more orderly and could prevent an unrelated variable from getting clobbered from an
errant key. For example,
$things = 'unsaid';
$REQUEST = array(He=>This, said=>1, my=>is, info=>2, had=>a,
very=>3, important=>test, things=>4);
$aVarToExtract = array(my, important, info);
extract (array_intersect_key ($REQUEST, array_flip($aVarToExtract)));
will extract
$my = 'is';
$important = 'test';
$info = 2;
but will leave certain
$things = 'unsaid'
Csaba Gabor from Vienna
NB. Of course the composite request coming in from a web page is in $_REQUEST.
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