Important: #107649 - Dependency Injection cache is now PHP version dependant 

Description 

TYPO3 uses the PHP library symfony/dependency-injection to build a dependency injection container that contains class factories for services used by TYPO3 or by installed extensions.

With the update to symfony/dependency-injection v7.3 – which may be installed in TYPO3 v13 composer mode – the created factories are optimized to use certain PHP language level features, if available, which result in a cache that is incompatible when used with older PHP versions.

In a scenario where the dependency injection cache is created in a CLI PHP process (e.g. PHP v8.4), this may result in a cache to be created that is incompatible with a Web PHP process (e.g. PHP v8.2), if the minor versions of the CLI and Web environments differ.

For this reason the major and minor PHP version numbers are now hashed into the dependency injection cache identifier, resulting in a possible cache-miss on the first web-request after a deployment, if the system was prepared via bin/typo3 with a CLI PHP process version that is different to the Web PHP version.

Make sure to configure the PHP CLI process version php -v to use the same version number as configured for the Web process. The Web process version can be introspected in the backend toolbar entry System Information > PHP Version.