php抓取网页数据遇到的问题

1.file_get_contents无法抓取https安全协议的网站

改用curl获取数据

function file_get_contents_by_curl($url){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_HEADER,0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,false);
$result = curl_exec($ch);
curl_close($ch);return $result;}

require('phpQuery.php'); 
$content = file_get_contents_by_curl($url);
$html = phpQuery::newDocumentHTML($content);

2.iconv特殊字符无法进行转换

改进方式：mb_convert_encoding($str,'GBK','utf-8');