Outdated TYPO3 Version
This documentation refers to an outdated TYPO3 version - either select a supported version or make sure to use a TYPO3 Extended Long Term Support (ELTS) version to continue getting security updates.
Use staging servers for developments and tests¶
During the development phase of a project and also after the launch of a TYPO3 site as ongoing maintenance work, it is often required to test if new or updated extensions, PHP, TypoScript or other code meets the requirements.
A website that is already “live” and publicly accessible should not be used for these purposes. New developments and tests should be done on so called “staging servers” which are used as a temporary stage and could be messed up without an impact on the “live” site. Only relevant/required, tested and reviewed clean code should then be implemented on the production site.
This is not security-related on the first view but “tests” are often grossly negligent implemented, without security aspects in mind. Staging servers also help keeping the production sites slim and clean and reduce maintenance work (e.g. updating extensions which are not in use).