无论是畅言还是多说,我都需要从远程抓取文章的评论数,然后存入本地数据库。对于多说,请求的格式如下:


// 获取评论次数,参数是文章ID


function getCommCount($postid)


{


    $jsondata = file_get_contents(“http://api.duoshuo.com/threads/counts.json?short_name=i94web&threads=$postid”); // 设置true返回数组,不设置或者是false则返回对象$resjson= json_decode($jsondata,true); return $resjson[‘response’][$postid][‘comments’];


}


对于远程请求,有很多种方法。今天,LZ就搜罗了六种,供大家参考。


1、用file_get_contents 以get方式获取内容:


<?php


$url=’http://www.ido321.com/’;


$html = file_get_contents($url);


echo $html;


?>


2、用fopen打开url,用get方式获取


$fp = fopen($url, ‘r’);


stream_get_meta_data($fp);


while(!feof($fp)) {


$result .= fgets($fp, 1024);


}


echo “url body: $result”;


fclose($fp);


3、用file_get_contents 以post方式获取内容:


$data = array (‘foo’ => ‘bar’);


$data = http_build_query($data);

$opts = array (


‘http’ => array (


‘method’ => ‘POST’,


‘header’=> “Content-type: application/x-www-form-urlencodedrn” . ‘Content-Length: ‘ . strlen($data) . ‘rn’, ‘content’ => $data ) ); $context = stream_context_create($opts); $html = file_get_contents(‘http://localhost/e/admin/test.html’, false, $context); echo $html;


    4、用fsockopen函数打开url,以get方式获取完整的数据,包括header和body,fsockopen需要 PHP.ini 中 allow_url_fopen 选项开启


function get_url ($url,$cookie=false)


{


$url = parse_url($url);


$query = $url[path].’?’.$url[query];


echo ‘Query:’.$query;


$fp = fsockopen( $url[host], $url[port]?$url[port]:80 , $errno, $errstr, 30);


if (!$fp) {


return false;


} else {


$request = ‘GET $query HTTP/1.1rn’;


$request .= ‘Host: $url[host]rn’;


$request .= ‘Connection: Closern’;


if($cookie) $request.=’Cookie:  $cookien’;


$request.=’rn’;


fwrite($fp,$request);


while([email protected]($fp)) {


$result .= @fgets($fp, 1024);


}


fclose($fp);


return $result;


}


}


//获取url的html部分,去掉header


function GetUrlHTML($url,$cookie=false)


{


$rowdata = get_url($url,$cookie);


if($rowdata)


{


$body= stristr($rowdata,’rnrn’);


$body=substr($body,4,strlen($body));


return $body;


}

return false;


}


     5、用fsockopen函数打开url,以POST方式获取完整的数据,包括header和body


function HTTP_Post($URL,$data,$cookie, $referrer=”)


{

// parsing the given URL


$URL_Info=parse_url($URL);

// Building referrer


if($referrer==”) // if not given use this script as referrer


$referrer=’111′;

// making string from $data


foreach($data as $key=>$value)


$values[]=’$key=’.urlencode($value);


$data_string=implode(‘&’,$values);

// Find out which port is needed – if not given use standard (=80)


if(!isset($URL_Info[‘port’]))


$URL_Info[‘port’]=80;

// building POST-request:


$request.=”POST “.$URL_Info[‘path’].” HTTP/1.1n”; $request.=”Host: “.$URL_Info[‘host’].”n”; $request.=”Referer: $referern”; $request.=”Content-type: application/x-www-form-urlencodedn”; $request.=’Content-length: ‘.strlen($data_string).”n”; $request.=’Connection: closen’; $request.=’Cookie: $cookien’; $request.=’n’; $request.=$data_string.’n’; $fp = fsockopen($URL_Info[‘host’],$URL_Info[‘port’]); fputs($fp, $request);while(!feof($fp)) { $result .= fgets($fp, 1024); } fclose($fp); return $result;


}


    6、使用curl库,使用curl库之前,可能需要查看一下php.ini是否已经打开了curl扩展


$ch = curl_init();


$timeout = 5;


curl_setopt ($ch, CURLOPT_URL, ‘http://www.ido321.com/’);


curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);


curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);


$file_contents = curl_exec($ch);


curl_close($ch);

echo $file_contents;