There is a feature similar to this in Perl, but this is considered to be a very bad idea, because it makes code utterly unmaintainable. Use arrays instead.

my $index = 0;
my @array;
$array[0] = "hello";
$array[1] = "world";
print "$names[0] $names[1]"; #=> "hello world"
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You can also use variables for the 0 or 1: “my $index = 0; $array[$index] = "hello"”

Or you could use hashes

my $index = 0;
my %hash;
$hash{greeting} = "hello";
$hash{name} = "world";
print "$hash{greeting} $hash{name}"; #=> "hello world"
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Again, you could also use variables:

my $key = "greeting";
$hash{$key} = "hello";
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Edit: properly escaped square brackets

The canonical explanation why you shouldn't use variables as variable names was given by MJD in the varvarname emails.

Also, the above formatting got b0rked. The second paragraph should be:

You can also use variables for the 0 or 1: “my $index = 0; $array[$index] = "hello"”

Because you posted as a registered user, you can un-b0rk your own original post by editing it, in this case by adding  <code> ... </code> tags. Please see Writeup Formatting Tips and Markup in the Monastery.

Update: If you edit or update one of your posts, please add a brief notation of the edit and its nature.