這也是個老生常談的話題了,上午花了點時間把這個問題整理了一下。
一般來說用PHP來模擬post提交數據有三種方法,file_get_contents、curl和socket。
寫了個公用函數,專門用來打印post數據:
<?php
function pr() {
$params = func_get_args();
foreach ($params as $key => $value) {
echo "<pre>";
print_r($value);
echo "</pre>";
}
}
先寫一個post.php,用來接收post數據並打印出來:
<?php
require dirname(__FILE__).'/function.php';
if (isset($_POST) && !empty($_POST)) {
pr($_POST);
} else {
pr("NO POST DATA!");
}
下面是用file_get_contents來模擬post:
<?php
require dirname(__FILE__).'/function.php';
function file_get_contents_post($url, $post) {
$options = array(
'http' => array(
'method' => 'POST',
// 'content' => 'name=caiknife&[email protected]',
'content' => http_build_query($post),
),
);
$result = file_get_contents($url, false, stream_context_create($options));
return $result;
}
$data = file_get_contents_post("http://www.a.com/post/post.php", array('name'=>'caiknife', 'email'=>'[email protected]'));
var_dump($data);
很簡單是吧?再來看看curl模擬post:
<?php
require dirname(__FILE__).'/function.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;
}
$data = curl_post("http://www.a.com/post/post.php", array('name'=>'caiknife', 'email'=>'[email protected]'));
var_dump($data);
最後是用socket來模擬post:
<?php
require dirname(__FILE__).'/function.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);
$header = <<<HEADER
POST {$urls['path']} HTTP/1.1
Host: {$urls['host']}
Content-Type: application/x-www-form-urlencoded
Content-Length: {$length}
Connection: close
{$post}
HEADER;
fwrite($fp, $header);
$result = '';
while (!feof($fp)) {
// receive the results of the request
$result .= fread($fp, 512);
}
$result = explode("\r\n\r\n", $result, 2);
return $result[1];
}
$data = socket_post("http://www.a.com/post/post.php", array('name'=>'caiknife', 'email'=>'[email protected]'));
var_dump($data);
這三種方法最後看到的內容都是一樣的,但是在是用socket的時候,發送header信息時必須要注意header的完整信息,比如content type和content length必須要有,connection: close和post數據之間要空一行,等等;而通過socket取得的內容是包含了header信息的,要處理一下才能獲得真正的內容。