Pin generator

I have pin plugin for vip sales. But these pins are extremely long and difficult. How can I generate 10 letter codes consisting of numbers and letters only?

PHP:

<?php

namespace androcyber\utils;

class AutomaticPinSystem{

    private const LENGTH = "\x31\x30";

    public const DAYS = [
        "Monday" => "Pazartesi",
        "Tuesday" => "Salı",
        "Wednesday" => "Çarşamba",
        "Thursday" => "Perşembe",
        "Friday" => "Cuma",
        "Saturday" => "Cumartesi",
        "Sunday" => "Pazar"
    ];

    public static function generatePin() : ?string{
        try{
            return STATIC_PIN_PREFIX . "-" . strtoupper(bin2hex(random_bytes((int) self::LENGTH)));
        }catch(\Exception $exception){
            return static::generatePin();
        }
    }

    public static function diffTime(int $finish) : string{
        $now = new \DateTime();
        $finishDateTime = new \DateTime();
        $finishDateTime->setTimestamp($finish);
        $finishDate = new \DateTime((string)$finishDateTime->format('Y-m-d H:i:s'));
        $remainingTime = $now->diff($finishDate);
        return $remainingTime->format('%m Ay, %d Gün, %H Saat, %i Dakika, %s Saniye');
    }
}
?>

i think private const LENGTH = "\x31\x30"; and return STATIC_PIN_PREFIX . "-" . strtoupper(bin2hex(random_bytes((int) self::LENGTH)));

but i dont know how to change this.

 

https://lmgtfy.app/?q=How+can+I+generate+10+letter+codes+consisting+of+numbers+and+letters+only?+php

 

PHP:

$pass = substr(md5(uniqid(mt_rand(), true)) , 0, 10);