Why PHP does not have this feature ?

Hi.... first of all... sry for my english... im braziliam...

I use PHP for several years and can not understand why PHP does not have a native function to the code SECURITY owner.

I see some extensions such as Zend and yoncube but paid.

I recently saw one in the repository blenc extension called, which tries to do this but does not work properly.

For what reason it was not done yet a native extension for this purpose?

Thousands of programmers worldwide need this facility.