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。

<?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);

<?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);

<?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);