https://www.hackerrank.com/challenges/plus-minus/problem

filter_positive_negative.php

<?php

$handle = fopen ("php://stdin","r");
fscanf($handle,"%d",$n);
$arr_temp = fgets($handle);
$arr = explode(" ",$arr_temp);
$arr = array_map('intval', $arr);

$count = count($arr);

$positive = count(array_filter($arr, function ($i) { return $i > 0; })) / $count;
$negative = count(array_filter($arr, function ($i) { return $i < 0; })) / $count;
$zeroes   = count(array_filter($arr, function ($i) { return $i = 0; })) / $count;

printf("%f\n%f\n%f", $positive, $negative, $zeroes);

?>