Loading multiple versions of the same class

Question

Let\'s say I release a code library as a standalone PHP class. Someone then uses version 1.0 of that library in their application. Later, I release version 2.0 of the libr

Answer 1

Let the user select a version, then according to that load your api file

The file name should be dynamically determinable, for example:

include('/lib/api-'.$versionId.'/library.php'); 

if version -1.0 as wise

Be careful to ensure that the user input is converted into a single decimal float and nothing nefarious.