I'm planning on upgrade my PHP to version 5.3. Most of my sites are running on the TYPO3 framework. Some of this have an install before TYPO3 version 4.5. Are there any known issues of older TYPO3 versions and PHP 5.3?
I can't find anything about system requirements for this older TYPO3 versions.
TYPO3 Versions at a Glance https://typo3.org/download/
TYPO3 UpgradeWiki https://docs.typo3.org/typo3cms/InstallationGuide/Upgrade/
TYPO3 Versions on Wikipedia: http://en.wikipedia.org/wiki/TYPO3
The following tables give you more details about TYPO3 version requirements.
Status 06.02.2015
Status 07.11.2014
Typo3 is now called TYPO3 CMS
Status 24.07.2014
Status 15.08.2012
Status 28.12.2010
Currently I am running TYPO3 4.6 with PHP 5.4.x and I had no issues so far.