in PHP server:
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: POST, GET, OPTIONS, DELETE, PUT');
header('Access-Control-Allow-Headers: X-Requested-With, Content-Type, Origin, Authorization, Accept, Client-Security-Token, Accept-Encoding, X-Auth-Token, content-type');
in Angular POST request:
const httpOptions = {
headers: new HttpHeaders()
}
httpOptions.headers.append('Access-Control-Allow-Origin', '*');
httpOptions.headers.append('Content-Type', 'application/json');
httpOptions.headers.append('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
this.httpClient.post(<url>, <body>, httpOptions);