PHP：6种GET和POST请求发送方法

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在i94web博客中，我试过了畅言和多说两种社会化评论框，后来还是抛弃了畅言，不安全。

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,$request);
while(!@feof($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;