本文主要展示了php发送get、post请求的6种方法的代码示例,分别为使用file_get_contents 、fopen、fsockopen、curl来发送GET和POST请求，代码如下：

方法1: 用file_get_contents 以get方式获取内容：

1 <?php
2     $url='
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     stream_get_meta_data($fp);
4     while(!feof($fp)) {
5         $result .= fgets($fp, 1024);
6     }
7     echo “url body: $result”;
8     fclose($fp);
9 ?> 

方法3：用file_get_contents函数,以post方式获取url

 1 <?php
 2     $data = array (‘foo' => ‘bar');
 3     $data = http_build_query($data);
 4  
 5     $opts = array (
 6         ‘http' => array (
 7 ‘method' => ‘POST',
 8 ‘header'=> “Content-type: application/x-www-form-urlencodedrn” . “Content-Length: ” . strlen($data) . “rn”,
10 ‘content' => $data
11         )
12     );
13  
14     $context = stream_context_create($opts);
15     $html = file_get_contents(‘ false, $context);
16  
17     echo $html;
18 ?> 

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/1.1rn”;
12 $request .= “Host: $url[host]rn”;
13 $request .= “Connection: Closern”;
14 if($cookie) $request.=”Cookie:  $cookien”;
15  $request.=”rn”;
16 fwrite($fp,$request);
17 while(!@feof($fp)) {
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,”rnrn”);
31 $body=substr($body,4,strlen($body));
32 return $body;
33         }
34  
35         return false;
36     }
37 ?> 

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  
 5         // parsing the given URL
 6         $URL_Info=parse_url($URL);
 7  
 8         // Building referrer
 9         if($referrer==”") // if not given use this script as referrer
10 $referrer=”111″;
11  
12         // making string from $data
13         foreach($data as $key=>$value)
14 $values=”$key=”.urlencode($value);
15         $data_string=implode(“&”,$values);
16  
17         // Find out which port is needed – if not given use standard (=80)
18         if(!isset($URL_Info["port"]))
19 $URL_Info["port"]=80;
20  
21         // building POST-request:
22         $request.=”POST “.$URL_Info["path"].” HTTP/1.1n”;
23         $request.=”Host: “.$URL_Info["host"].”n”;
24         $request.=”Referer: $referern”;
25         $request.=”Content-type: application/x-www-form-urlencodedn”;
26         $request.=”Content-length: “.strlen($data_string).”n”;
27         $request.=”Connection: closen”;
28  
29         $request.=”Cookie:  $cookien”;
30  
31         $request.=”n”;
32         $request.=$data_string.”n”;
33  
34         $fp = fsockopen($URL_Info["host"],$URL_Info["port"]);
35         fputs($fp, $request);
36         while(!feof($fp)) {
37 $result .= fgets($fp, 1024);
38         }
39         fclose($fp);
40  
41         return $result;
42     }
43 ?> 

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, ‘
 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  
10     echo $file_contents;
11 ?>