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You must upgrade your applications to the latest supported runtime version to continue receiving security updates and be eligible for
technical support.
The process of upgrading an existing app depends on the runtime version that
your app currently uses:
PHP second-generation runtimes (after end of support): To upgrade to a
supported version of PHP,
update the app.yaml file by specifying a version of PHP that you
want your app to run. For example:
runtime:phpVERSION
Where VERSION is the PHP MAJOR and MINOR version numbers.
For example, to use the latest PHP version, PHP 8.3,
specify 83.
For more information, see the
PHP runtime overview.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-05 UTC."],[[["Applications must be upgraded to the latest supported runtime version to receive security updates and technical support."],["PHP 5.5 applications must be migrated to a supported PHP version, as PHP 5.5 reached end of support on January 30, 2024."],["While existing PHP 5.5 apps will continue to run, App Engine may block redeployment after the end of support date."],["Upgrading PHP second-generation runtimes involves updating the `app.yaml` file to specify the desired supported PHP version."]]],[]]
