php实现post和get

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file_get_contents版本：

01<?php
02/**
03 * 发送post请求
04 * @param string $url 请求地址
05 * @param array $post_data post键值对数据
06 * @return string
07 */
08function send_post($url,$post_data) {
09 
10    $postdata= http_build_query($post_data);
11    $options= array(
12        'http'=> array(
13            'method'=> 'POST',
14            'header'=> 'Content-type:application/x-www-form-urlencoded',
15            'content'=> $postdata,
16            'timeout'=> 15 * 60 // 超时时间（单位:s）
17        )
18    );
19    $context= stream_context_create($options);
20    $result= file_get_contents($url, false,$context);
21 
22    return$result;
23}

使用如下：

1$post_data = array(
2    'username'=> 'stclair2201',
3    'password'=> 'handan'
4);
5send_post('http://blog.snsgou.com',$post_data);

实战经验：

当我利用上述代码给另一台服务器发送http请求时，发现，如果服务器处理请求时间过长，本地的PHP会中断请求，即所谓的超时中断，第一个怀疑的是PHP本身执行时间的超过限制，但想想也不应该，因为老早就按照这篇文章设置了“PHP执行时间限制”（【推荐】PHP上传文件大小限制大全），仔细琢磨，想想，应该是http请求本身的一个时间限制，于是乎，就想到了怎么给http请求时间限制搞大一点。。。。。。查看PHP手册，果真有个参数 “ timeout ”，默认不知道多大，当把它的值设大一点，问题得已解决，弱弱地做个笔记~~~

Socket版本:

01/**
02 * Socket版本
03 * 使用方法：
04 * $post_string = "app=socket&amp;version=beta";
05 * request_by_socket('blog.snsgou.com', '/restServer.php', $post_string);
06 */
07function request_by_socket($remote_server,$remote_path,$post_string,$port= 80,$timeout = 30) {
08    $socket= fsockopen($remote_server,$port, $errno,$errstr, $timeout);
09    if(!$socket)die("$errstr($errno)");
10    fwrite($socket,"POST $remote_path HTTP/1.0");
11    fwrite($socket,"User-Agent: Socket Example");
12    fwrite($socket,"HOST: $remote_server");
13    fwrite($socket,"Content-type: application/x-www-form-urlencoded");
14    fwrite($socket,"Content-length: " . （strlen($post_string) + 8） ."");
15    fwrite($socket,"Accept:*/*");
16    fwrite($socket,"");
17    fwrite($socket,"mypost=$post_string");
18    fwrite($socket,"");
19    $header= "";
20    while($str = trim(fgets($socket, 4096))) {
21        $header.= $str;
22    }
23 
24    $data= "";
25    while(!feof($socket)) {
26        $data.= fgets($socket, 4096);
27    }
28 
29    return$data;
30}

Curl版本:

01/**
02 * Curl版本
03 * 使用方法：
04 * $post_string = "app=request&version=beta";
05 * request_by_curl('http://blog.snsgou.com/restServer.php', $post_string);
06 */
07function request_by_curl($remote_server,$post_string) {
08    $ch= curl_init();
09    curl_setopt($ch, CURLOPT_URL,$remote_server);
10    curl_setopt($ch, CURLOPT_POSTFIELDS,'mypost=' . $post_string);
11    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
12    curl_setopt($ch, CURLOPT_USERAGENT,"snsgou.com's CURL Example beta");
13    $data= curl_exec($ch);
14    curl_close($ch);
15 
16    return$data;
17}

Curl版本(2)

01/**
02 * 发送HTTP请求
03 *
04 * @param string $url 请求地址
05 * @param string $method 请求方式 GET/POST
06 * @param string $refererUrl 请求来源地址
07 * @param array $data 发送数据
08 * @param string $contentType
09 * @param string $timeout
10 * @param string $proxy
11 * @return boolean
12 */
13function send_request($url,$data, $refererUrl= '', $method = 'GET',$contentType = 'application/json',$timeout = 30, $proxy= false) {
14    $ch= null;
15    if('POST'=== strtoupper($method)) {
16        $ch= curl_init($url);
17        curl_setopt($ch, CURLOPT_POST, 1);
18        curl_setopt($ch, CURLOPT_HEADER,0 );
19        curl_setopt($ch, CURLOPT_FRESH_CONNECT, 1);
20        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
21        curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);
22        curl_setopt($ch, CURLOPT_TIMEOUT,$timeout);
23        if($refererUrl) {
24            curl_setopt($ch, CURLOPT_REFERER,$refererUrl);
25        }
26        if($contentType) {
27            curl_setopt($ch, CURLOPT_HTTPHEADER,array('Content-Type:'.$contentType));
28        }
29        if(is_string($data)){
30            curl_setopt($ch, CURLOPT_POSTFIELDS,$data);
31        } else {
32            curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
33        }
34    } else if('GET'=== strtoupper($method)) {
35        if(is_string($data)) {
36            $real_url= $url. (strpos($url,'?') === false ? '?': '').$data;
37        } else {
38            $real_url= $url. (strpos($url,'?') === false ? '?': ''). http_build_query($data);
39        }
40 
41        $ch= curl_init($real_url);
42        curl_setopt($ch, CURLOPT_HEADER, 0);
43        curl_setopt($ch, CURLOPT_HTTPHEADER,array('Content-Type:'.$contentType));
44        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
45        curl_setopt($ch, CURLOPT_TIMEOUT,$timeout);
46        if($refererUrl) {
47            curl_setopt($ch, CURLOPT_REFERER,$refererUrl);
48        }
49    } else {
50        $args= func_get_args();
51        returnfalse;
52    }
53 
54    if($proxy) {
55        curl_setopt($ch, CURLOPT_PROXY,$proxy);
56    }
57    $ret= curl_exec($ch);
58    $info= curl_getinfo($ch);
59    $contents= array(
60            'httpInfo'=> array(
61                    'send'=> $data,
62                    'url'=> $url,
63                    'ret'=> $ret,
64                    'http'=> $info,
65            )
66    );
67 
68    curl_close($ch);
69    return$ret;
70}

调用 WCF接口的一个例子：$json = restRequest($r_url,'POST', json_encode($data));

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