https://www.hackerrank.com/challenges/birthday-cake-candles/problem

birthday_cake_candles.php

<?php

$handle = fopen ("php://stdin", "r");
function birthdayCakeCandles($n, $ar) {
    // Complete this function
    $a = array_count_values($ar);
    rsort($a, SORT_NUMERIC);
    
    return reset($a);
}

fscanf($handle, "%i",$n);
$ar_temp = fgets($handle);
$ar = explode(" ",$ar_temp);
$ar = array_map('intval', $ar);
$result = birthdayCakeCandles($n, $ar);
echo $result . "\n";

?>