php curl 获取源文件

curl 获取源文件
//$_GET[url]=file:///etc/passwd
eg:192.168.3.119/curl.php?url=file://f:hoblock.sql
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $_GET[url]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
$output = curl_exec($ch);
curl_close($ch);
print_r($output);