Query search engine ranking position with PHP code

<?php 
 
$page=30; //The page number
$domain="lansj.com"; //The domain name
//$domain="lost63.com"; 
for($n=0;$n<=$page;$n++){ 
$url='http://www.google.cn/search?hl=zh-CN&newwindow=1&q=%E6%B7%B1%E5%9C%B3%E6%91%84%E5%BD%B1%E5%B7%A5%E4%BD%9C%E5%AE%A4&start='.$n.'0&sa=N'; 
//$url='http://www.google.cn/search?hl=zh-CN&lr=&newwindow=1&q=%E8%BF%B7%E5%A4%B1%E8%B7%AF%E4%B8%8A&start='.$n.'0&sa=N'; 
$file=fopen($url,"r"); 
while(!feof($file)) 
{ 
$result.=fgets($file,9999); 
} 
if(strpos($result,$domain)==true){ 
echo ' In the first '.$n.' Page after ather <br>'; 
$n=$page; 
}else{ 
echo ' The first '.$n.' Page not found <br>'; 
} 
fclose($file); 
} 
?>