Hackerrank Birthday Cake Candles

birthdayCakeCandles.php

<?php

// Complete the birthdayCakeCandles function below.
function birthdayCakeCandles($ar) {

    //Count occurrance of each value in array
     $candleCount = array_count_values($ar);

    //This is the single higest value in the array
     $tallestCandleCount = max($candleCount); 

    //Return how many times the single higest value occurs in array
    return $tallestCandleCount;
}