怎么用PHP发送HTTP请求（POST请求、GET请求）?
file_get_contents版本：
01 /** 02 * 发送post请求 03 * @param string $url 请求地址 04 * @param array $post_data post键值对数据 05 * @return string 06 */ 07 function send_post($url, $post_data) { 08 09 $postdata = http_build_query($post_data); 10 $options = array( 11 'http' =>; array( 12 'method' =>; 'POST', 13 'header' =>; 'Content-type:application/x-www-form-urlencoded', 14 'content' =>; $postdata, 15 'timeout' =>; 15 * 60 // 超时时间（单位:s） 16 ) 17 ); 18 $context = stream_context_create($options); 19 $result = file_get_contents($url, false, $context); 20 21 return $result; 22 }
使用如下：
1 post_data = array( 2 'username' => 'stclair2201', 3 'password' => 'handan' 4 ); 5 send_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&version=beta"; 05 * request_by_socket('blog.snsgou.com', '/restServer.php', $post_string); 06 */ 07 function request_by_socket($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', $post_string); 06 */ 07 function request_by_curl($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 $proxy 11 * @return boolean 12 */ 13 function send_request($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 $args = func_get_args(); 51 return false; 52 } 53 54 if($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));
