PHP 5.4 with sparkling

My server administrator just told me that the theme Sparkling would not be compatible with PHP 5.4 and works well only with PHP 5.3 !!???
Do you have the same problem and fix it ?

Our demo site runs on PHP 5.6 which is the current version. PHP 5.4 is 3 years old and no longer supported by developers. However, we are more than certain that Sparkling works on 5.4, 5.5, 5.6 and other versions.