Created
December 16, 2023 05:08
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Bitwise operations permission system example in PHP
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| 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(); |
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