Returning Value from Max(Key) in Array

[learning_brain]

Interesting one this and I have searched high and low for an answer...

I have an associative array where image types are given a score.

The array is set up in a loop so that the score is used as the key and the value is the name of the image type.

$imageScores [$score] = $imageType;

I am trying to return the image type (i.e. the value) from that array where it has the highest key (score).

I can't use a simple max() because it will only return a max value and not a max key.

Am I doing this the wrong way round? Should I set up ...

$imageScores[$imageType] = $score;

.. I can then easily obtain the highest score, but how do I get the associated key image type?

It's probably simple but I can't get my head round it.

Any help would be appreciated.

Richard

 

[lemon-tree]

Try using krsort, it'll sort the array descending by the key rather than the value:

//Setup your array:
$imageScores[$score] = $imageType;
//etc

//Sort by key, max score is now the first item in the array
krsort($imageScores, SORT_NUMERIC);

//Get the first item in the array, there are hundreds of ways you could do this and this is just one:
$maxValue = reset($imageScores);

If you need the key (score) as well as the value (as I suspect you might), the reset() method will not work and you may have to do something like a foreach or extract the key values:

//Setup your array:
$imageScores[$score] = $imageType;
//etc

//Get the scores as an array
$scoresArray = array_keys($imageScores);

//Get the max value
$maxKey = max($scoresArray);
$maxValue = $imageScores[$maxKey];

There are probably hundreds of other ways of doing it too.

 

[learning_brain]

This is perfect - the 2nd method is ideal and can't believe I couldn't get my head round that.

I've also changed the scoring to percentage which works even better!

Thanks lemon-tree...yet again.