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Informations about the package phpfork
thelevti/phpfork
Requirements | Installation | Usage
A simple library to make forking a processes as easy as possible.
thelevti/phpfork follows semantic versioning. Read more on semver.org.
Requirements
- PHP 7.2 or above
- php-pcntl to allow this library forking processes.
- php-posix to allow this library getting process information.
- php-shmop to allow this library doing interprocess communication.
Installation
Composer
To use this library with composer, run the following terminal command inside your repository's root folder.
Usage
This library uses the namespace TheLevti\phpfork.
Example: Basic process forking
Example: Upload images to a CDN
Feed an iterator into the process manager and it will break the job into multiple batches and spread them across many processes.
Example: Working with Doctrine DBAL
When working with database connections, there is a known issue regarding parent/child processes. See php doc for pcntl_fork:
The reason for the MySQL "Lost Connection during query" issue when forking is the fact that the child process inherits the parent's database connection. When the child exits, the connection is closed. If the parent is performing a query at this very moment, it is doing it on an already closed connection, hence the error.
This will mean that in our example, we will see a SQLSTATE[HY000]: General error: 2006 MySQL server has gone away exception being thrown in the parent
process.
One work-around for this situation is to force-close the DB connection before
forking, by using the PRE_FORK event.
