Comparing elements in a multidimensional array

Question

Say i have a multidimensional array. For example:

 Array ( 
         [0] => Array ( 
             [animal_id] => 5494 
             [animal_name] =>         


        

Answer 1

You could run through the array and then crosscheck every item:

foreach($aAnimals AS $iKey => $aAnimalData
{
    foreach($aAnimals AS $iSubKey => $aData)
    {
        if($aAnimalData['animal_type'] == $aData['animal_type'] && $iKey != $iSubKey)
        {
            // Start doing whatever you want to do when the types match.
            // The last part makes sure the second foreach does not 
            // match with the first one.
        }
    }
}

If you specify what kind of comparing you want I could improve this answer with that.