I am creating WordPress plugin in php so I need to use SIFT algorithm for image comparison from database, but I did not find any SIFT algorithm library in php, only available in c and c++. I have tried to search in google but not get success. Somewhere I read that "SIFT algorithm implementation in php is very complicate and approximate impossible to use in production so use c or c++ library." But I can not change programing language and not able to create php extension. So I have few questions,
1: It is possible to implement SIFT algorithm in php, if yes then any php library available for that?
2: It is possible to use c++ library in php without creating php extension, for example Run command line c++ in php and get output. any c or c++ library available for SIFT algorithm to use in command line?