Posted by Karl Groves on 08/15/06 19:27

"Rik" <luiheidsgoeroe@hotmail.com> wrote in
news:ebspir$a83$1@netlx020.civ.utwente.nl:

> Karl Groves wrote:
>> I'm looking to make a keyword array.
>>
>> Let's say I have the following array:
>>
>> $words = array
>>
> ("foo","lorem","foo","ipsum","bar","foo","dolor","sit","foo","bar","am
e
> t","
>> lorem");
>>
>> I'd like to create a new array with the top X words, ordered by
>> occurrence In the above example, the new array would be:
>> $keywords = array("foo","bar","lorem");
>
>
> I assum the top X words, ordered _descending_?
>
> $number = 10;//or another if you wish
> $top =
> array_slice(array_keys(rsort(array_count_values($words))),0,$number);
>
> If PHP5 or higher this will be better:
> $top =
> array_keys(array_slice(rsort(array_count_values($words)),0,
$number,true
> ));
>
> Grtz,

Thanks for the response.

Here's what I have:

$words = array("foo", "lorem", "ipsum", "foo", "dolor", "sit", "bar",
"amet", "four", "score", "foo", "and", "seven", "bar", "years", "ago",
"foo", "our", "lipsum", "forefathers", "foo");

$number = 3;

$top = array_keys(array_slice(rsort(array_count_values($words)),0,
$number,true));

print("<pre>");
var_dump($top);
print("</pre>");


Returns the following error:

Warning: array_keys() [function.array-keys]: The first argument should
be an array in /path/to/file.php on line 7



--
Karl Groves
www.karlcore.com

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