From:             kop at meme dot com
Operating system: All
PHP version:      4.3.2
PHP Bug Type:     Arrays related
Bug description:  Enhancement: extract() takes array of keys

I want to get variables passed from the client into local (not global)
variables.  If the variable has not been passed from the client I do not
want a local variable defined.  While this can be coded for each variable
I want to do this with, there is no way to abstract this operation into a
function.

The (untested) code to get a form variable 'foo' would be:

if (array_key_exists($_POST, 'foo') {
  $foo = &{$_POST['foo'])}
}
// $foo may or may not be defined, so if I've got strict
// error checking on I get a nice error if I ref an undefined
//variable.  And, $foo is nice and local so it won't show
// where I don't send it.

If extract() took an array of keys as another argument, extracting only
those keys that are in the list, I could get the form variables, foo, bar,
and baz with:

extract($_POST, EXTR_REFS, '', array('foo', 'bar', 'baz'));

-- 
Edit bug report at http://bugs.php.net/?id=24116&edit=1
-- 
Try a CVS snapshot:         http://bugs.php.net/fix.php?id=24116&r=trysnapshot
Fixed in CVS:               http://bugs.php.net/fix.php?id=24116&r=fixedcvs
Fixed in release:           http://bugs.php.net/fix.php?id=24116&r=alreadyfixed
Need backtrace:             http://bugs.php.net/fix.php?id=24116&r=needtrace
Try newer version:          http://bugs.php.net/fix.php?id=24116&r=oldversion
Not developer issue:        http://bugs.php.net/fix.php?id=24116&r=support
Expected behavior:          http://bugs.php.net/fix.php?id=24116&r=notwrong
Not enough info:            http://bugs.php.net/fix.php?id=24116&r=notenoughinfo
Submitted twice:            http://bugs.php.net/fix.php?id=24116&r=submittedtwice
register_globals:           http://bugs.php.net/fix.php?id=24116&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=24116&r=php3
Daylight Savings:           http://bugs.php.net/fix.php?id=24116&r=dst
IIS Stability:              http://bugs.php.net/fix.php?id=24116&r=isapi
Install GNU Sed:            http://bugs.php.net/fix.php?id=24116&r=gnused

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