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 <?php
 
function curl_post($url, $post){
 
$options = array(
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);
return $result;
}
 
$data = curl_post("http://www.a.com/post/post.php", array('name'=>'caiknife','email'=>'caiknife#gmail.com'));
 
var_dump($data);
 第三种：socket来模拟post <?php
 
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];
 
}
 
$data = socket_post("http://www.a.com/post/post.php", array('name'=>'caiknife','email'=>'caiknife#gmail.com'));
var_dump($data);
 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。 http://www.shuchengxian.com/html/PHP/201512/23.html