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- Compute (Dynos)
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Command Line

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Continuous Delivery & Integration
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  - Node.js Behavior in Heroku
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  - Working with Node.js
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- Java
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- PHP
  - Working with PHP
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- Go
  - Go Dependency Management
- Scala
- Clojure
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Databases & Data Management
- Heroku Postgres
  - Postgres Basics
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  - Postgres Performance
  - Postgres Data Transfer & Preservation
  - Postgres Availability
  - Postgres Special Topics
- Heroku Key-Value Store
- Apache Kafka on Heroku
- Other Data Stores

Monitoring & Metrics
- Logging

App Performance

Add-ons
- All Add-ons

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Security
- App Security
- Identities & Authentication
  - Single Sign-on (SSO)
- Private Spaces
  - Infrastructure Networking
- Compliance

Heroku Enterprise
- Enterprise Accounts
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- Heroku Connect (Salesforce sync)
  - Heroku Connect Administration
  - Heroku Connect Reference
  - Heroku Connect Troubleshooting

Patterns & Best Practices

Extending Heroku
- Platform API
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  - Add-on Development Tasks
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- Building CLI Plugins
- Developing Buildpacks
- Dev Center

Accounts & Billing

Troubleshooting & Support

Integrating with Salesforce

September 2023 PHP updates

Change effective on 30 September 2023

The following new PHP runtime versions are now available:

The following PHP extensions have been added or updated:

ext-amqp 2.1.0
ext-blackfire 1.90.0
ext-newrelic 10.12.0.1
ext-phalcon 5.3.1
ext-redis 6.0.1 (now supports lz4, lzf, and zstd compression)

The following versions of Composer used during builds have been added or updated:

Composer 1.10 (legacy): 1.10.27
Composer 2.2 (LTS): 2.2.22
Composer 2.6 (latest): 2.6.4

The blackfire CLI agent program used by ext-blackfire has been updated to version 2.22.0.

Heroku-20 and Heroku-22 stack images updated New Labs Feature: Heroku Runtime Routing 2.0 (Beta)