[RESOLVED] Why doesn't it work?

[yoki]

Ok I have the following functions that checks $array for duplicate values and returns an array containing the keys of duplicates :

function unique_events($array){

$count= array_intersect_assoc($array, array_flip( array_count_values($array)));

foreach($array as $key=>$value){

   if (in_array($value,$count)){ 
       $return[$value][]=$key;



   }

}

return $return;
}

The function will work properly with the following array:

Array ( [0] => Cadence Healthcare,Montreal,Canada [1] => Merck,Montreal,Canada [2] => Cadence Healthcare,Montreal,Canada )

but not with this one:

Array ( [0] => Cadence Healthcare,Montreal,Canada [1] => Cadence Healthcare,Montreal,Canada [2] => Pfizer,Paris,France )

I'm confused why!?!? :bemused:

[paulnaj]

rtfm I'm afraid.

The very first example/notes explains exactly why!

Paul 🙂

[yoki]

euh what is rtfm?

Should I be using this function then instead? Will it work?

function array_key_intersect(&$a, &$b) {
$array = array();
while (list($key,$value) = each($a)) {
if (isset($b[$key]))
$array[$key] = $value;
}
return $array;
}

instead of php's array_intersect_assoc which seems to be causing the problem. :mad:

[yoki]

Thanks paulnaj!!! You're a life saver! The function worked great!!! 🙂

[paulnaj]

Hi Yoki,

rtfm is a rather rude (sorry about that) acronym for Read the FXXXXXX Manual.

And yes, it was the array_intersect_assoc() function that was causing the problem. For two array items to be considered equal both the values AND the keys have to be the same.

Anyway, you sorted it.

Paul 🙂