PHP - Frequency Distribution Table

<?php
        $category = 8;
        $data = array(
            164, 150, 132, 144, 125, 149, 145, 146,
            158, 140, 147, 136, 148, 152, 144, 168,
            126, 138, 176, 163, 119, 154, 165, 146,
            173, 142, 147, 135, 153, 140, 135, 161,
            145, 135, 142, 150, 156, 145, 128, 157
        );
        $min = min($data);
        $max = max($data);
        $limit = ceil(($max - $min) / $category);
        sort($data);
        for ($i = 0; $i < $category; $i++) {
            $count = 0;
            foreach ($data as $key => $number) {
                if ($number <=  (($min + ($limit - 1)) + ($i * $limit))) {
                    $count++;
                    unset($data[$key]);
                }
            }
            echo ($min + ($i * $limit)) . '-' . (($min + ($limit - 1)) + ($i * $limit)) . ' => ' . $count.'<br>';
        }
        
        //Output
        119-126 => 3
        127-134 => 2
        135-142 => 9
        143-150 => 13
        151-158 => 6
        159-166 => 4
        167-174 => 2
        175-182 => 1

Thanks for this!