1.PHP REQUIREMENT LINK : https://docs.xmbforum2.com/index.php?title=Requirements
2.We have changed PHP requirement to PHP 5.4 in version 1.9.11.15 , as it was not working on PHP 5.2 ,5.3(installer halts in PHP 5.3 and there is parse error in PHP 5.2 
 i.e Parse error: syntax error, unexpected '[' in /{{path}}/{{to}}/{{xmbdir}}/db/mysqli.php on line 302)
3.Release date : https://sourceforge.net/projects/xmb-forum/files/?source=navbar
4.XMB 1.9.12.03 is the security version hence we have launch the version as it and in import it is still 1.9.12
(same in 1.9.12.05)