Send multiple images Ionic

Hello, my name is Igor Freitas and I am Brazilian, so I apologize for my English.

I’m having problems sending more than one image to the server (PHP) at the same time, in the example I followed I send one without problems, but when it comes to two or more I have difficulties, someone has some example that can help me ?

Note: I am not very experienced with typescript and angular, this problem is chasing me for days and I did not find a good solution, I have deadline to deliver this application and I am very grateful to anyone who can help me.

Nobody can say anything useful without knowing what the server is expecting.

Hi, I forgot to mention, I followed this guide: