Bitwise operations permission system example in PHP

test.php

class Permission
{

    private const int READ = 10;

    private const int WRITE = 20;

    private const int DELETE = 40;


    private int $permission = 0;


    public function giveRead(): void
    {
        $this->permission |= self::READ;
    }

    public function giveWrite(): void
    {
        $this->permission |= self::WRITE;
    }

    public function giveDelete(): void
    {
        $this->permission |= self::DELETE;
    }

    public function toInteger(): int
    {
        return $this->permission;
    }

    /**
     * @noinspection PhpUnused
     * @return void
     */
    public function removeWrite(): void
    {
        $this->permission &= ~self::WRITE;
    }

    /**
     * @noinspection PhpUnused
     * @return bool
     */
    public function hasWrite(): bool
    {
        return ($this->permission & self::WRITE) === self::WRITE;
    }

    public function hasRead(): bool
    {
        return ($this->permission & self::READ) === self::READ;
    }

    public function toBinary(): string
    {
        return sprintf('%b', $this->toInteger());
    }

    public function removeDelete(): void
    {
        $this->permission &= ~self::DELETE;
    }
}


$permission = new Permission();

$permission->giveDelete();
$permission->giveWrite();


echo $permission->hasRead();


$permission->removeWrite();

$permission->toBinary();
$permission->toInteger();