<?php
/**
 * Created by PhpStorm.
 * User: francesco
 * Date: 21/05/2018
 * Time: 22:42
 */


$hit = 0;
$limit = (int) drush_get_option("limit", 20);
$attempts = (int) drush_get_option("attempts", 50000);

if ($limit < 1 || $limit > 100) {
  echo "limit must be between 1 and 100\n";
  return;
}
echo "Attempts are $attempts\n";
echo "Limit is $limit%\n";
for ($i = 1; $i <= $attempts; $i++) {
  $hit = $hit + (rand(1, 100) <= $limit ? 1 : 0);
  echo $i . " attempts processed so far.... (temp hit ratio is " . ($hit / $i) * 100 . "%)       \r";
}
echo "\n";
echo "Final hit ratio is was " . ($hit / $attempts) * 100 . "%\n";

/*
OUTPUT IS SOMETHING SIMILAR TO THIS:

Attempts are 100000
Limit is 30%
100000 attempts processed so far.... (temp hit ratio is 30.258%)

Final hit ratio is was 30.258%
*/