- time: documentation ( source)
- print_r: documentation ( source)
- exp: documentation ( source)
- strtotime: documentation ( source)
<?php
$score = 0;
$now = time();
for ($i=0; $i<10; $i++) {
$time = strtotime("- " . (10 - i) . " hours");
$timeScore = 1 - (($now - $time) / $now);
$score += 1/(1+exp(12*$timeScore + 12));
print_r(array('time' => $time, 'timeScore' => $timeScore, 'score' => $score));
}