stats.php

$count = array();

$path = __DIR__.'/php-fig/mbox/';
foreach(scandir($path) as $file) {
    if(in_array($file, array('.', '..'))) {
        continue;
    }

    $file = file_get_contents($path.$file);

    preg_match('#From: "?([^\n\r]*?)"? <#', $file, $m);
    if(empty($m)) continue;

    $from = $m[1];
    $from = imap_mime_header_decode($from);
    $from = $from[0]->text;

    if($from == "Roman Tsjupa") {
        $from = "Dracony";
    }

    preg_match('#Date: (.*?) [\-\+]#', $file, $m);
    $date = date_parse($m[1]);

    if($date['year'] != '2015') {
        continue;
    }

    if($date['month'] < 10) {
        //continue;
    }

    if(!array_key_exists($from, $count)) {
        $count[$from] = 0;
    }

    $count[$from]++;
}

$filtered = array();
foreach($count as $key => $val) {
    if($val > 3) {
        $filtered[$key] = $val;
    }
}
arsort($filtered);
echo json_encode($filtered, JSON_UNESCAPED_UNICODE);