hot.php

<?php

function _hot($upvotes = 0, $downvotes = 0, $posted = 0) {
    $s = $upvotes - $downvotes;
    $order = log(max(abs($s), 1), 10);

    if ($s > 0) {
        $sign = 1;
    }
    elseif($s < 0) {
        $sign = -1;
    }
    else {
        $sign = 0;
    }

    $seconds = $posted - 1134028003;

    return round($sign * $order + (int)($seconds / 45000), 7);
}

echo _hot(1000, 1500, 1262304000) . PHP_EOL;  // 2847.30103
echo _hot(1000, 1500, 1353107345) . PHP_EOL;  // 4865.30103 

hot.py

# from __future__ import division  # uncomment for same PHP's behaviour

from math import log10


def score(n1, n2):
    return n1 - n2


def _hot(ups, downs, date):
    s = score(ups, downs)
    order = log10(max(abs(s), 1))

    if s > 0:
        sign = 1
    elif s < 0:
        sign = -1
    else:
        sign = 0

    seconds = date - 1134028003

    return round(sign * order + seconds / 45000, 7)


print _hot(1000, 1500, 1262304000)  # py3 2847.8787411, py2 2847.30103
print _hot(1000, 1500, 1353107345)  # py3 4865.7308522, py2 4865.30103

int.php

<?php

echo intval(3.3) . PHP_EOL;  // 3
echo intval(3.5) . PHP_EOL;  // 3
echo intval(3.9) . PHP_EOL;  // 3

echo round(3.3) . PHP_EOL;  // 3
echo round(3.5) . PHP_EOL;  // 4
echo round(3.9) . PHP_EOL;  // 4

echo floor(3.3) . PHP_EOL;  // 3
echo floor(3.5) . PHP_EOL;  // 3
echo floor(3.9) . PHP_EOL;  // 3

echo (int) 3.3 . PHP_EOL;  // 3
echo (int) 3.5 . PHP_EOL;  // 3
echo (int) 3.9 . PHP_EOL;  // 3

int.py

print int(3.3)  # 3
print int(3.5)  # 3
print int(3.9)  # 3