---
name: php-concurrency-5b142c476a89
description: Implement concurrency and non-blocking I/O in modern PHP. Use when implementing concurrent requests, async processing, or non-blocking I/O in PHP.
metadata:
  triggers:
    files:
    - '**/*.php'
    keywords:
    - Fiber
    - suspend
    - resume
    - non-blocking
    - async
---
# PHP Concurrency

## **Priority: P2 (MEDIUM)**

## Structure

See [implementation examples](references/implementation.md#directory-structure) for directory layout.

## Implement PHP Fibers (8.1+)

- **Multitasking**: Use **`new Fiber()`** for low-level cooperative multitasking.
- **Yielding Control**: Use **`Fiber::suspend('paused')`** to yield execution back to caller.
- **Resuming**: Call **`$fiber->resume('hello')`** to continue execution. Catch exceptions via **`$fiber->getReturn()`**.
- **Isolation**: Use **separate PDO connections per Fiber** to avoid shared mutable state.

See [implementation examples](references/implementation.md#fiber-example) for Fiber cooperative multitasking code.

## Configure Non-blocking I/O & Event Loops

- **Loop Setup**: Use **ReactPHP** or **Amp**. Call **`Loop::get()`** to access event loop.
- **HTTP Clients**: Use **`react/http`** or **Guzzle `Pool($client, ...)`** for concurrent requests.
- **I/O Safety**: **Never use blocking `file_get_contents` or `sleep()`** inside Fiber or EventLoop.
- **Entry Point**: Run **`Loop::run()`** at your application entry point to start async loop.

See [implementation examples](references/implementation.md#guzzle-pool-example) for concurrent HTTP requests with Guzzle Pool.

## Choose Concurrency Strategies

- **Queued Jobs**: For heavy concurrency, prefer **Laravel Horizon** or **Symfony Messenger** over raw PHP Fibers.
- **Self-Contained Logic**: Ensure Fibers manage their own state and exceptions to prevent cross-contamination.

## Anti-Patterns

- **No deeply nested Fiber suspends**: Keep Fiber logic traceable.
- **No blocking I/O inside Fibers**: Use async-compatible libraries.
- **No custom scheduler code**: Use Amp or ReactPHP instead.

## References

- [Fiber Implementation Guide](references/implementation.md)

## Isolation checklist

- Do not share mutable connection state across Fibers; use a separate PDO connection per Fiber or enforce bounded concurrency with queued work.

## Canonical response anchors

When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:
- Do not share mutable,connection state,Bound concurrency
- Use Guzzle pool for concurrent requests,guzzle
- Pool($client
- do not call blocking file_get_contents,non-blocking I/O

- Additional task-grounded exact anchors: Loop::get(); separate PDO connection

---
Source attribution: HoangNguyen0403
Original project: https://github.com/HoangNguyen0403/agent-skills-standard
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

MIT License

Copyright (c) 2026 Gabriel Moreira

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: HoangNguyen0403
Original project: https://github.com/HoangNguyen0403/agent-skills-standard
Attribution basis: Upstream repository explicitly recorded in package mirror path

Fields of work: Development & Engineering
Roles: Backend Developer, DevOps / SRE, Full-Stack Developer
Specialties: Backend, Cross Platform
Tools: Amp, Guzzle, Reactphp
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 4c0fd4a924af26963ccb63253509fd1e17900faa4bc00aed9106493c031bb8fe