php发送get、post请求的几种方法

转自：http://blog.csdn.net/haha00217/article/details/7969504

方法1: 用file_get_contents 以get方式获取内容

1 <?php
2 $url=‘http://www.domain.com/‘;
3 $html = file_get_contents($url);
4 echo $html;
5 ?>  

方法2: 用fopen打开url, 以get方式获取内容

1 <?php
2 $fp = fopen($url, ‘r‘);
3 //返回请求流信息（数组：请求状态，阻塞，返回值是否为空，返回值http头等） 

1 stream_get_meta_data($fp);  

1 while(!feof($fp)) {
2 $result .= fgets($fp, 1024);
3 }
4 echo "url body: $result";
5 fclose($fp);
6 ?>
7  

方法3：用file_get_contents函数,以post方式获取url

1 <?php
2 $data = array (‘foo‘ => ‘bar‘);  

 1 //生成url-encode后的请求字符串，将数组转换为字符串
 2 $data = http_build_query($data);
 3 $opts = array (
 4 <span style="white-space:pre">  </span>‘http‘ => array (
 5 <span style="white-space:pre">      </span>‘method‘ => ‘POST‘,
 6 <span style="white-space:pre">      </span>‘header‘=> "Content-type: application/x-www-form-urlencoded\r\n" .
 7 <span style="white-space:pre">      </span>"Content-Length: " . strlen($data) . "\r\n",
 8 <span style="white-space:pre">      </span>‘content‘ => $data
 9 <span style="white-space:pre">  </span>)
10 ); 

1 //生成请求的句柄文件
2 $context = stream_context_create($opts);
3 $html = file_get_contents(‘http://localhost/e/admin/test.html‘, false, $context);
4 echo $html;
5 ?>  

方法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

 1 <?php
 2 function get_url ($url,$cookie=false)
 3 {
 4 $url = parse_url($url);
 5 $query = $url[path]."?".$url[query];
 6 echo "Query:".$query;
 7 $fp = fsockopen( $url[host], $url[port]?$url[port]:80 , $errno, $errstr, 30);
 8 if (!$fp) {
 9 return false;
10 } else {
11 $request = "GET $query HTTP/1.1\r\n";
12 $request .= "Host: $url[host]\r\n";
13 $request .= "Connection: Close\r\n";
14 if($cookie) $request.="Cookie:   $cookie\n";
15 $request.="\r\n";
16 fwrite($fp,$request);
17 while()) {
18 $result .= @fgets($fp, 1024);
19 }
20 fclose($fp);
21 return $result;
22 }
23 }
24 //获取url的html部分，去掉header
25 function GetUrlHTML($url,$cookie=false)
26 {
27 $rowdata = get_url($url,$cookie);
28 if($rowdata)
29 {
30 $body= stristr($rowdata,"\r\n\r\n");
31 $body=substr($body,4,strlen($body));
32 return $body;
33 }
34     return false;
35 }
36 ?>  

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

 1 <?php
 2 function HTTP_Post($URL,$data,$cookie, $referrer="")
 3 {
 4     // parsing the given URL
 5 $URL_Info=parse_url($URL);
 6     // Building referrer
 7 if($referrer=="") // if not given use this script as referrer
 8 $referrer="111";
 9     // making string from $data
10 foreach($data as $key=>$value)
11 $values[]="$key=".urlencode($value);
12 $data_string=implode("&",$values);
13     // Find out which port is needed - if not given use standard (=80)
14 if(!isset($URL_Info["port"]))
15 $URL_Info["port"]=80;
16     // building POST-request:
17 $request.="POST ".$URL_Info["path"]." HTTP/1.1\n";
18 $request.="Host: ".$URL_Info["host"]."\n";
19 $request.="Referer: $referer\n";
20 $request.="Content-type: application/x-www-form-urlencoded\n";
21 $request.="Content-length: ".strlen($data_string)."\n";
22 $request.="Connection: close\n";
23     $request.="Cookie:   $cookie\n";
24     $request.="\n";
25 $request.=$data_string."\n";
26     $fp = fsockopen($URL_Info["host"],$URL_Info["port"]);
27 fputs($fp, $request);
28 while(!feof($fp)) {
29 $result .= fgets($fp, 1024);
30 }
31 fclose($fp);
32     return $result;
33 }
34 ?>  

方法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

 1 <?php
 2 $ch = curl_init();
 3 $timeout = 5;
 4 curl_setopt ($ch, CURLOPT_URL, ‘http://www.domain.com/‘);
 5 curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
 6 curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
 7 $file_contents = curl_exec($ch);
 8 curl_close($ch);
 9 echo $file_contents;
10 ?>