Are there any specific steps or configurations required to ensure compatibility with older applications like typo3 when running multiple PHP versions?

When running multiple PHP versions on a server, compatibility issues may arise with older applications like Typo3 that require specific PHP configurations. To ensure compatibility, you can use a tool like PHP Version Manager (phpbrew) to switch between PHP versions for different applications. Additionally, you may need to adjust PHP settings or install specific PHP extensions to meet the requirements of the older application.

// Example of using phpbrew to switch PHP versions
$ phpbrew use php-7.2.34 // Switch to PHP 7.2.34 for Typo3