Перевести код на php с js. (slice)

Сам придумал, сам обиделся , сделал )))) все ок).

 function random() {
  return (float)rand()/(float)getrandmax();
}

  $b = 'chrome';
    $c = 181874;
    $d = 8715824;
    $e = 42841287;
    $f = 8424317;
    $d = 328901;
    $g = 7689;
    $j = 733880;
    $n = 432350;
    $z = 1241412;
    $h = 1191240;
    $l = 124412412;
    $t = time();
    $c = $d / $c;
    $j = '/(?=\B(?:\d{3})+(?!\d))/g';
    $h = round($this->random() * (5 - 0) + 0);
    $l = $this->random() * ($e - $n) + $g;
    $z = intval($l / $c) + '';
    $temp = preg_replace('/(?=\B(?:\d{2})+(?!\d))/i', $b[$h], substr($z, 0, 4));
    $b = preg_replace('/(?=\B(?:\d{1})+(?!\d))/', $b[round($this->random() * (5 - 0) + 0)], $temp);