ionic problem No 'Access-Control-Allow-Origin'

Question

I\'m working on an ionic apps. My problem is: when I try to get data from server I got this:

XMLHttpRequest cannot load https://mywebsite.com/api. No

Answer 1

Put it on top of your PHP file like:

Note: as with all uses of the PHP header function, this must be before any output has been sent from the server.