/*
 * 用法 get_contents('www.kuitao8.com', 'utf-8');
 * 采集页面内容并自动转码
 * get_contents()自定义函数
 * $url 需要采集的页面地址
 * $timeout 超时时间，默认20
 */
function get_contents($url, $timeout = 20)
{
    if( function_exists('curl_init') ){
        $ch = curl_init();
        curl_setopt( $ch, CURLOPT_URL, $url );
        curl_setopt( $ch, CURLOPT_HEADER, false );
        curl_setopt( $ch, CURLOPT_TIMEOUT, $timeout );
        curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
        curl_setopt( $ch, CURLOPT_CONNECTTIMEOUT, $timeout );
        $content = curl_exec( $ch );
        curl_close( $ch );
        $data = $content ? $content : false;
    } else {
        //利用了stream_context_create()设置超时时间:
        $pots = array(
            'http' => array(
                'timeout' => $timeout
            )
        );
        $context = stream_context_create( $pots );
        $content = @file_get_contents( $url, false, $context );
        $data = $content ? $content : false;
    }
    return $data ? my_encoding( $content, 'utf-8' ) : false;
}
/*
* 页面内容并自动转码
* my_encoding()自定义函数
* $data 为 curl_exec() 或 file_get_contents() 所获得的页面内容
* $to 需要转成的编码
*/
function my_encoding( $data, $to )
{
    $encode_arr = array('UTF-8','ASCII','GBK','GB2312','BIG5','JIS','eucjp-win','sjis-win','EUC-JP');
    $encoded = mb_detect_encoding($data, $encode_arr);
    $data = mb_convert_encoding($data,$to,$encoded);
    return $data;
}