Use below code on the top of page with other domains URL.
<?php header(“Access-Control-Allow-Origin: http://sample.com”); ?>
If you want to add multiple cross domains add as follows:
<?php
$http_origin = $_SERVER[‘HTTP_ORIGIN’]; //To get current server URL.
$urls=array(‘http://sample1.com’,’http://sample2.com’); //Provide all other doamins as elements of array
if(in_array($http_origin,$urls)){
header(“Access-Control-Allow-Origin: $http_origin”);
}?>