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

birthday_cake_candles.php

<?php

// Complete the birthdayCakeCandles function below.
function birthdayCakeCandles($ar) {
    $maxHeight = max($ar); $cnt=0;
    foreach($ar as $candle){
        if($candle == $maxHeight){
            $cnt++;
        }
    }
    return $cnt;
}

$fptr = fopen(getenv("OUTPUT_PATH"), "w");

$stdin = fopen("php://stdin", "r");

fscanf($stdin, "%d\n", $ar_count);

fscanf($stdin, "%[^\n]", $ar_temp);
$ar = array_map('intval', preg_split('/ /', $ar_temp, -1, PREG_SPLIT_NO_EMPTY));
$result = birthdayCakeCandles($ar);
fwrite($fptr, $result . "\n");
fclose($stdin);
fclose($fptr);