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Building a PHP application Stay organized with collections Save and categorize content based on your preferences.

Specify the PHP version

By default the PHP Runtime buildpack uses the latest stable version of PHP. If your application requires a specific version, you can specify one by including a composer.json file in your application's root directory. For example:

"require": {
  "php": "8.3.*",
}

Configure Composer

By default, the Composer version is 2.1.3. If you require a specific version of Composer, you can use the GOOGLE_COMPOSER_VERSION environment variable to specify any supported version of Composer using the full semantic version. For example:

pack build sample-php --builder=gcr.io/buildpacks/builder \
  --env GOOGLE_COMPOSER_VERSION="2.2.20"

Customizing NGINX configurations

To configure NGINX, you can use the GOOGLE_CUSTOM_NGINX_CONFIG environment variable to specify your custom NGINX configuration file. For example:

pack build sample-php --builder=gcr.io/buildpacks/builder \
  --env GOOGLE_CUSTOM_NGINX_CONFIG="nginx-custom.conf"

When NGINX starts, your custom NGINX file is used.

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Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2026-08-11 UTC.

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