title: CORS header 'Access-Control-Allow-Origin' missing in php
body: <p>In my web application, try to pass data to another domain with ajax call. But it shows error like <code>Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://example.com/auth/webschool/test.php. (Reason: CORS header 'Access-Control-Allow-Origin' missing).</code>  </p>
  
  <p>My ajax code is,</p>
  
  <pre><code> $.ajax({
                  type: "POST",
                  url: "http://example.com/auth/webschool/test.php",
                  data: {username: "abcd",password:"abcd"},
                   dataType: "html",
                  success: function (data) {
                   alert(data);
                  }
              });
  </code></pre>