php抓取https的内容的代码

$url = (https://xxx.com"); 
file_get_contents($url); 
 
错误： 
Warning: file_get_contents(https://xxx.com) [function.file-get-contents]: failed to open stream: No such file or directory in D:wampwwwgrabber_clientindex.php on line 3 

用curl的方式是可以的： 
 代码如下:

$url = (https://xxx.com); 
$ch = curl_init(); 
curl_setopt($ch, CURLOPT_URL,$url); 
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); 
$result = curl_exec($ch); 
print_r($result); 
?> 
 
重点是以下两句： 
 代码如下:

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);