if (defined($hash{"foo"}))

[Anon]

How would I do the following Perl in PHP?

if (defined($hash{"foo"})) {
print "entry already exits";
}

I thought in_array would be the correct way but it never reports true.

if (in_array("foo", $hash)) {
print "entry already exits";
}

what function should I use?
thanks,
-j

[Anon]

This would probably do the job..

if ($hash["foo"] != '') {
print 'entry already exists';
}

[Anon]

if ($hash["foo"] != '') {
print 'entry already exists';
}

does not work if "foo" is not a key in the associative array. The following warning is generated:

Warning: Undefined index: foo in form.php on line 140

[Anon]

My bad,

use isset(),

if (isset($hash["foo"])) {
print "entry already exists";
}

[Anon]

Alternately,

if (array_key_exists("foo",$hash)) {
echo "entry already exists";
}