跨域问题的解决方案 php

1 XMLHttpRequest cannot load http://server.runoob.com/server.php. No 'Access-Control-Allow-Origin' header is present on the requested resource.Origin 'http://client.runoob.com' is therefore not allowed access.

1 header('Access-Control-Allow-Origin:http://client.runoob.com');

 1 $origin = isset($_SERVER['HTTP_ORIGIN'])? $_SERVER['HTTP_ORIGIN'] : '';  
 2   
 3 $allow_origin = array(  
 4     'http://client1.runoob.com',  
 5     'http://client2.runoob.com'  
 6 );  
 7   
 8 if(in_array($origin, $allow_origin)){  
 9     header('Access-Control-Allow-Origin:'.$origin);       
10 } 

1 header('Access-Control-Allow-Origin:*');