Lock library to provide serialized execution of PHP code. It helps executing critical code in concurrent situations.

Choose from one of the provided implementations, or create/extend your own. The provided implementations include: CASMutex, FlockMutex, MemcachedMutex, PHPRedisMutex, PredisMutex, SemaphoreMutex, TransactionalMutex, MySQLMutex, and PgAdvisoryLockMutex.