TYPO3 Extbase extension development method came along with the release of TYPO3 4.3.0 in November 2009. Extbase is a PHP-based framework which supports developers in creating clean and easily maintainable TYPO3 extensions.The first real presentation of Extbase happened in April 2009 on the american TYPO3 Conference in Dallas, and a month later on the TYPO3 Developer Days in Elmshorn near Hamburg. After that, a lot of positive feedback and constructive criticism emerged from the community.