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Example code of fgremez/flagbag

Informations about the package flagbag

FlagBag

A lightweight PHP library to manipulate bitmask integers as typed objects.

No dependencies. No framework required.

Installation

Requirements: PHP >= 8.1

Concept

Each flag is a power of 2. The stored value is the sum of active flags.

This allows efficient storage (a single integer column) and native SQL filtering:

Usage

1. Define a FlagBag

Extend FlagBag and declare your boolean properties with #[FlagBit]. Each value must be a power of 2.

2. Hydrate from an integer

3. Read a flag

4. Write a flag

5. Chaining

6. Integrate with any class

The column stays a plain integer — no custom ORM type needed.

Exceptions

Exception Thrown when
UnknownFlagException get()/set() called with a flag name that does not exist
InvalidFlagBitValueException A #[FlagBit] value is not a power of 2
FlagBitCollisionException Two properties share the same #[FlagBit] value

Integer limits

Storage Size Max flags Max value
TINYINT 8 bits 7 127
SMALLINT 16 bits 15 32 767
INT 32 bits 31 2 147 483 647
BIGINT 64 bits 62 ~4.6×10¹⁸

License

MIT — see LICENSE

All versions of flagbag with dependencies

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Package Version
Requires php Version >=8.1
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