PHP curl模拟浏览器采集阿里巴巴的实现代码

<?php 
set_time_limit(0); 
function _rand() { 
$length=26; 
$chars = "0123456789abcdefghijklmnopqrstuvwxyz"; 
$max = strlen($chars) - 1; 
mt_srand((double)microtime() * 1000000); 
$string = ''; 
for($i = 0; $i < $length; $i++) { 
$string .= $chars[mt_rand(0, $max)]; 
} 
return $string; 
} 
$HTTP_SESSION=_rand(); 
$HTTP_SESSION; 
$HTTP_Server="search.china.alibaba.com"; 
$HTTP_URL="/company/k-%CB%AE%CB%AE%CB%AE_n-y.html"; 
$ch = curl_init(); 
curl_setopt ($ch,CURLOPT_URL,"http://".$HTTP_Server.$HTTP_URL); 
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true); 
curl_setopt($ch,CURLOPT_USERAGENT,"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)"); 
$res = curl_exec($ch); 
curl_close ($ch); 
print_r($res); 
?>