for example, I want to develop an APP with chat and moments, the back end is in PHP language, and the front and back ends are separated, and what framework is more suitable to use? at present, all I know is thinkphp, lumen and other frameworks that are more suitable for front and back end separation, but I am still puzzling about what is more appropriate, it is better to be the kind of open source information that is more, welcome bosses to help answer. -sharp-sharp-sharp problem description