無論是暢言還是多說，我都需要從遠端抓取文章的評論數，然後存入本地資料庫。對于多說，請求的格式如下：
// 擷取評論次數,參數是文章id
function getcommcount($postid)
{
$jsondata = file_get_contents("http://api.duoshuo.com/threads/counts.json?short_name=i94web&threads=$postid"); // 設定true傳回數組,不設定或者是false則傳回對象 $resjson= json_decode($jsondata,true); return $resjson['response'][$postid]['comments'];
}
對于遠端請求，有很多種方法。今天，lz就搜羅了六種，供大家參考。
1、用file_get_contents 以get方式擷取内容：
<?php
$url='http://www.ido321.com/';
$html = file_get_contents($url);
echo $html;
?>
2、用fopen打開url，用get方式擷取
$fp = fopen($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方式擷取内容：
$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 $html;
4、用fsockopen函數打開url，以get方式擷取完整的資料，包括header和body,fsockopen需要 php.ini 中 allow_url_fopen 選項開啟
function get_url ($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,$request);
while(!@feof($fp)) {
$result .= @fgets($fp, 1024);
return $result;
//擷取url的html部分，去掉header
function geturlhtml($url,$cookie=false)
$rowdata = get_url($url,$cookie);
if($rowdata)
$body= stristr($rowdata,'rnrn');
$body=substr($body,4,strlen($body));
return $body;
5、用fsockopen函數打開url，以post方式擷取完整的資料，包括header和body
function http_post($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庫，使用curl庫之前，可能需要檢視一下php.ini是否已經打開了curl擴充
$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;
來源：51cto