Cors Policy Sorunu

var url = "https://reqbin.com/echo";

var xhr = new XMLHttpRequest();
xhr.open("GET", url);

xhr.onreadystatechange = function () {
   if (xhr.readyState === 4) {
      console.log(xhr.status);
      console.log(xhr.responseText);
   }};

xhr.send();

var url = "https://reqbin.com/echo";

var xhr = new XMLHttpRequest();
xhr.open("GET", url);

xhr.onreadystatechange = function () {
   if (xhr.readyState === 4) {
      console.log(xhr.status);
      console.log(xhr.responseText);
   }};

xhr.send();

<?php
header('Access-Control-Allow-Origin: *');
?>

<?php
if (!isset($_GET["url"])) {
    exit;
}
$contents = file_get_contents($_GET['url']);
$pattern = "/^content-types*:s*(.*)$/i";
if (($header = array_values(preg_grep($pattern, $http_response_header))) &&
    (preg_match($pattern, $header[0], $match) !== false))
{
    $content_type = $match[1];
    header('Content-type: '.$content_type);
    echo $contents;
}