php cors issue with axios post - php

Question

I have a simple post request with axios to php script which renders some pdfs and should return a String.
Now I got this error:
Access to XMLHttpRequest at 'IP:7580/pdfgen/pdfGen.php' from origin 'http://localhost:8080' has been blocked by CORS policy: Request header field content-type is not allowed by Access-Control-Allow-Headers in preflight response.
I set this in my php file:
<?php
error_reporting(E_ALL);
header('Access-Control-Allow-Origin: *');
With no changes. also tried this:
header('Access-Control-Allow-Origin: *');
header("Access-Control-Allow-Methods: GET, POST, OPTIONS, PUT, DELETE");
header("Access-Control-Allow-Headers: Content-Type, Access-Control-Allow-Headers, X-Requested-With");
also no changes.
my axios call looks like this:
axios.post("http://IP:7580/pdfgen/pdfGen.php", this.state)
.then(response => {
report = {...this.state.report};
report.createdAt = reportCreatedAt;
window.open(response.data);
this.setState({report: report, pdf: response.data});
console.log(response);
})
What could solve this?
Thanks in advance

Answer 1

A working solution for me is:
if (isset($_SERVER['HTTP_ORIGIN'])) {
// Decide if the origin in $_SERVER['HTTP_ORIGIN'] is one
// you want to allow, and if so:
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Credentials: true');
header('Access-Control-Max-Age: 1000');
}
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD'])) {
// may also be using PUT, PATCH, HEAD etc
header("Access-Control-Allow-Methods: POST, GET, OPTIONS, PUT, DELETE");
}
if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS'])) {
header("Access-Control-Allow-Headers: Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization");
}
exit(0);
}