【荐】怎么⽤PHP发送HTTP请求（POST请求、GET请求）？
file_get_contents版本：
<?php
/**
* 发送post请求
* @param string $url 请求地址
* @param array $post_data post键值对数据
* @return string
*/
function send_post($url, $post_data) {
$postdata = http_build_query($post_data);
$options = array(
'http' => array(
'method' => 'POST',
'header' => 'Content-type:application/x-www-form-urlencoded',
'content' => $postdata,
'timeout' => 15 * 60 // 超时时间（单位:s）
)
);
$context = stream_context_create($options);
$result = file_get_contents($url, false, $context);
return $result;
}
使⽤如下：
$post_data = array(
'username' => 'stclair2201',
'password' => 'handan'
);
send_post('blog.snsgou', $post_data);
实战经验：curl命令发送post请求带参数
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”（），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:
/**
* Socket版本
* 使⽤⽅法：
* $post_string = "app=socket&version=beta";
* request_by_socket('blog.snsgou', '/restServer.php', $post_string);
*/
function request_by_socket($remote_server,$remote_path,$post_string,$port = 80,$timeout = 30) {
$socket = fsockopen($remote_server, $port, $errno, $errstr, $timeout);
if (!$socket) die("$errstr($errno)");
fwrite($socket, "POST $remote_path HTTP/1.0");
fwrite($socket, "User-Agent: Socket Example");
fwrite($socket, "HOST: $remote_server");
fwrite($socket, "Content-type: application/x-www-form-urlencoded");
fwrite($socket, "Content-length: " . （strlen($post_string) + 8） . "");
fwrite($socket, "Accept:*/*");
fwrite($socket, "");
fwrite($socket, "mypost=$post_string");
fwrite($socket, "");
$header = "";
while ($str = trim(fgets($socket, 4096))) {
$header .= $str;
}
$data = "";
while (!feof($socket)) {
$data .= fgets($socket, 4096);
}
return $data;
}
Curl版本:
/**
* Curl版本
* 使⽤⽅法：
* $post_string = "app=request&version=beta";
* request_by_curl('blog.snsgou/restServer.php', $post_string);
*/
function request_by_curl($remote_server, $post_string) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $remote_server);
curl_setopt($ch, CURLOPT_POSTFIELDS, 'mypost=' . $post_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERAGENT, "snsgou's CURL Example beta");
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
Curl版本(2)
/**
* 发送HTTP请求
*
* @param string $url 请求地址
* @param string $method 请求⽅式 GET/POST
* @param string $refererUrl 请求来源地址
* @param array $data 发送数据
* @param string $contentType
* @param string $timeout
* @param string $proxy
* @return boolean
*/
function send_request($url, $data, $refererUrl = '', $method = 'GET', $contentType = 'application/json', $timeout = 30, $proxy = false) { $ch = null;
if('POST' === strtoupper($method)) {
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_HEADER,0 );
curl_setopt($ch, CURLOPT_FRESH_CONNECT, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
if ($refererUrl) {
curl_setopt($ch, CURLOPT_REFERER, $refererUrl);
}
if($contentType) {
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type:'.$contentType));  }
if(is_string($data)){
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
} else {
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
}
} else if('GET' === strtoupper($method)) {
if(is_string($data)) {
$real_url = $url. (strpos($url, '?') === false ? '?' : ''). $data;
} else {
$real_url = $url. (strpos($url, '?') === false ? '?' : ''). http_build_query($data);
}
$ch = curl_init($real_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type:'.$contentType));  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
if ($refererUrl) {
curl_setopt($ch, CURLOPT_REFERER, $refererUrl);
}
} else {
$args = func_get_args();
return false;
}
if($proxy) {
curl_setopt($ch, CURLOPT_PROXY, $proxy);
}
$ret = curl_exec($ch);
$info = curl_getinfo($ch);
$contents = array(
'httpInfo' => array(
'send' => $data,
'url' => $url,
'ret' => $ret,
'http' => $info,
)
);
curl_close($ch);
return $ret;
}
调⽤ WCF接⼝的⼀个例⼦：$json = restRequest($r_url,'POST', json_encode($data));

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