PHP 通过fsockopen函数获取远程网页源码

<?php
$fp = fsockopen("www.baidu.com", 80, &$errno, &$errstr, 10);
if(!$fp) {
        echo "$errstr ($errno)<br>\n";
} else {
        fputs($fp,"GET / HTTP/1.0\nHost: www.baidu.com\n\n");
        while(!feof($fp)) {
                echo fgets($fp,128);
        }
        fclose($fp);
}
?>