$html = file_get_contents('http://www.baidu.com');
print_r($http_response_header);
$fp = fopen('http://www.baidu.com', 'r');
print_r(stream_get_meta_data($fp));
fclose($fp);

$url = 'http://192.168.31.63/2.php';
$data = array(
    'item' => 'test data',
);
$content = http_build_query($data);
$content_length = strlen($content);
$options = array(
    'http' => array(
        'method' => 'POST',
        'header' =>
        "Content-type: application/x-www-form-urlencoded\r\n" .
        "Content-length: $content_length\r\n",
        'content' => $content
    )
);
echo file_get_contents($url, false, stream_context_create($options));

<?php
/**
 * @Author: anchen
 * @Date:   2017-03-23 13:51:46
 * @Last Modified by:   anchen
 * @Last Modified time: 2017-03-23 13:53:46
 */
file_put_contents('./1.txt', var_export($_POST, true));//把接收的数据储存起来

$data = [
    'author' => '白菜打下',
    'mail' => '[email protected]',
    'text' => '博主很给力',
];
$data = http_build_query($data);
$opts = [
    'http' => [
        'method' => 'POST',
        'header' => "Content-type:application/x-www-form-urlencoded\r\n".
                    "Content-Length: ".strlen($data)."\r\n".
                    "Cookie: PHPSESSID=13ROTEGFGJDFDFDOGDFGD"."\r\n".
                    "User-Agent: Mozilla/5.0(Windows: U; Windows NT 6.1; zh-CH; rv: 1.9.2.13) Gecko/20101203 Firefox/3.6.13"."\r\n".
                    "Referer:http://aiyooyoo.com/index.php/archives/7/"."\r\n",
        'content' => $data,
    ],
];
$context = stream_context_create($opts);
$html = @file_get_contents('http://aiyooyoo.com/index.php/archives/7/comment', false, $context);