PHP：file_get_contents($loc)失败

PHP版本是5.2.4
allow_url_fopen为ON

Warning: file_get_contents() [function.file-get-contents]: PHP_network_getaddresses: getaddrinfo Failed: Name or service not kNown in /var/www/html/2009/functions/functions.products.PHP on line 5

Warning: file_get_contents(http://data.example.com/new-data.PHP) [function.file-get-contents]: Failed to open stream: Success in /var/www/html/2009/functions/functions.products.PHP on line 5

脚本正在从http://www.example.com运行
传入该函数的位置是http://data.example.com/new-data.PHP

注意：相同的域名,但两个不同的服务器.

function getData() {
  $location = "http://data.mysite.com/new-data.PHP";
  $contents = file_get_contents($location);
  $jsonVars = json_decode($contents);
  return $jsonVars
}