三种方法教你如何用PHP模拟post提交数据

php模拟post传值在日常的工作中用到的不是很多，但是在某些特定的场合还是经常用到的。

下面，我整理了三种php模拟post传值的方法，file_get_contents、curl和socket。

第一种：file_get_contents来模拟post

<?php

function file_get_contents_post($url, $post){

$options = array(

'http'=> array(

'method'=>'POST',

'content'=> http_build_query($post),

),

);

$result = file_get_contents($url,false, stream_context_create($options));

return $result;

}

$data = file_get_contents_post("http://www.a.com/post/post.php", array('name'=>'caiknife','email'=>'caiknife#gmail.com'));

var_dump($data);

第二种：curl模拟post

function curl_post($url, $post){

CURLOPT_RETURNTRANSFER =>true,

CURLOPT_HEADER =>false,

CURLOPT_POST =>true,

CURLOPT_POSTFIELDS => $post,

$ch = curl_init($url);

curl_setopt_array($ch, $options);

$result = curl_exec($ch);

curl_close($ch);

$data = curl_post("http://www.a.com/post/post.php", array('name'=>'caiknife','email'=>'caiknife#gmail.com'));

第三种：socket来模拟post

function socket_post($url, $post){

$urls = parse_url($url);

if(!isset($urls['port'])){

$urls['port']=80;

$fp = fsockopen($urls['host'], $urls['port'], $errno, $errstr);

if(!$fp){

echo "$errno, $errstr";

exit();

$post = http_build_query($post);

$length = strlen($post);

$header =<<<HEADER

<span class="Apple-tab-span" style="white-space:pre"></span>POST {$urls['path']} HTTP/1.1

<span class="Apple-tab-span" style="white-space:pre"></span>Host:{$urls['host']}

<span class="Apple-tab-span" style="white-space:pre"></span>Content-Type: application/x-www-form-urlencoded

<span class="Apple-tab-span" style="white-space:pre"></span>Content-Length:{$length}

<span class="Apple-tab-span" style="white-space:pre"></span>Connection: close

<span class="Apple-tab-span" style="white-space:pre"></span>{$post}

<span class="Apple-tab-span" style="white-space:pre"></span>HEADER;

fwrite($fp, $header);

$result ='';

while(!feof($fp)){

$result .= fread($fp,512);

$result = explode("\r\n\r\n", $result,2);

return $result[1];

$data = socket_post("http://www.a.com/post/post.php", array('name'=>'caiknife','email'=>'caiknife#gmail.com'));

上面这三种方法最后看到的内容都是一样的，都可以得到post的传值；但是在是用socket的时候，发送header信息时必须要注意header的完整信息，比如content type和content length必须要有，connection: close和post数据之间要空一行，等等；而通过socket取得的内容是包含了header信息的，要处理一下才能获得真正的内容。

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