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I am using Codeigniter framework of PHP and trying to extract keywords from the page. The complete code for reference can be seen here . It is not ready-made though.

The issue is due to the array function in the following line:

$keywordCounts = array_count_values( $words );
The error message being displayed is as follows:
A PHP Error was encountered
Severity: Warning
Message: array_count_values() [function.array-count-values]: Can only count STRING and INTEGER values!
EDITED: The array $words for reference can be found here.
There are no special symbols or invalid characters to my knowledge in the $words array. Hyphens and periods are not read by the function or is there some other issue ?
                Its an array called $words which I am passing as you can see. I have displayed that array as a string of words separated by hyphens for reference. So that someone may find some word which the function cannot read either as a string or an integer.
– SilentAssassin
                Jan 17, 2013 at 9:07
                can you do a formatted output of your $words array as you can see below there is no error when passing your hyphenated list of words exploded into an array to the function.
– Lawrence Cherone
                Jan 17, 2013 at 9:10
                Some values in your array seems to be null and null is neither string nor integer: codepad.viper-7.com/0bniV2
– Leri
                Jan 17, 2013 at 11:12
                @RahulYadav Forgive me, I eliminated not null values. Here's what you need: codepad.viper-7.com/RuQLGw
– Leri
                Jan 17, 2013 at 11:59
you have null values in your array. you have to replace them before working with array_count_values like this:
$x = array('s'=>'ss', 'a',4 , 'sss' => null);
$ar = array_replace($x,array_fill_keys(array_keys($x, null),''));
$v = array_count_values($ar);
var_dump($v);
which will result:
array (size=4)
  'ss' => int 1
  'a' => int 1
  4 => int 1
  '' => int 1
                Okay this works! Is there any way to remove the null entry from the array ? And only the first and last entries of array are null. Is this happening due to some other reason or inconsistency ?
– SilentAssassin
                Jan 17, 2013 at 11:40
                it depends on your code, you haven't posted much code to see why it's behaving like this. and yes, you can delete the null valued indices of your array, take a look here and here too.
– mamdouh alramadan
                Jan 17, 2013 at 11:44
        
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