HttpClient php类库

GET行为比较简单，POST比较复杂一些。这里提供两种方法供选择：

第一：手写代码
第二：利用HttpClient php类库

第一种方法：代码如下：
$flag = 0;
//要post的数据
$argv = array(
'var1'=>'abc',
     'var2'=>'你好吗');
//构造要post的字符串
foreach ($argv as $key=>$value) {
     if ($flag!=0) {
             $params .= "&";
             $flag = 1;
     }
     $params.= $key."="; $params.= urlencode($value);
     $flag = 1;
     }
     $length = strlen($params);
         //创建socket连接
     $fp = fsockopen("127.0.0.1",80,$errno,$errstr,10) or exit($errstr."--->".$errno);
     //构造post请求的头
     $header = "POST /mobile/try.php HTTP/1.1";
     $header .= "Host:127.0.0.1";
     $header .= "Referer:/mobile/sendpost.php";
     $header .= "Content-Type: application/x-www-form-urlencoded";
     $header .= "Content-Length: ".$length."";
     $header .= "Connection: Close";
     //添加post的字符串
     $header .= $params."";
     //发送post的数据
     fputs($fp,$header);
     $inheader = 1;
     while (!feof($fp)) {
             $line = fgets($fp,1024); //去除请求包的头只显示页面的返回数据
             if ($inheader && ($line == "\n" || $line == "")) {
                 $inheader = 0;
             }
             if ($inheader == 0) {
                 echo $line;
             }
     }
fclose($fp);
?>

第二种方法是：使用httpclient类，代码如下：
$pageContents = HttpClient::quickPost('http://example.com/someForm', array(
    'name' => 'Some Name',
    'email' => 'email@example.com'
));

使用附件的类库，也可以去官方下载最新的类库，官方地址为：http://www.php.cn/
附加一些php httpclient的其他几个用法
静态方法获取网页
$pageContents = HttpClient::quickGet('http://example.com/');

Get方法获取
$client = new HttpClient('example.com');
if (!$client->get('/')) {
    die('An error occurred: '.$client->getError());
}
$pageContents = $client->getContent();

带调试的Get方法获取
$client = new HttpClient('example.com');
$client->setDebug(true);
if (!$client->get('/')) {
    die('An error occurred: '.$client->getError());
}
$pageContents = $client->getContent();

带自动转向的Get方法
$client = new HttpClient('www.amazon.com');
$client->setDebug(true);
if (!$client->get('/')) {
    die('An error occurred: '.$client->getError());
}
$pageContents = $client->getContent();

检查页面是否存在
$client = new HttpClient('example.com');
$client->setDebug(true);
if (!$client->get('/thispagedoesnotexist')) {
    die('An error occurred: '.$client->getError());
}
if ($client->getStatus() == '404') {
    echo 'Page does not exist!';
}
$pageContents = $client->getContent();

伪造客户端
$client = new HttpClient('example.com');
$client->setDebug(true);
$client->setUserAgent('Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.3a) Gecko/20021207');
if (!$client->get('/')) {
    die('An error occurred: '.$client->getError());
}
$pageContents = $client->getContent();

登录验证并请求一个网页
$client = new HttpClient('example.com');
$client->post('/login.php', array(
    'username' => 'Simon',
    'password' => 'ducks'
));
if (!$client->get('/private.php')) {
    die('An error occurred: '.$client->getError());
}
$pageContents = $client->getContent();

HTTP授权
$client = new HttpClient('example.com');
$client->setAuthorization('Username', 'Password');
if (!$client->get('/')) {
    die('An error occurred: '.$client->getError());
}
$pageContents = $client->getContent();

输出头信息
$client = new HttpClient('example.com');
if (!$client->get('/')) {
    die('An error occurred: '.$client->getError());
}
print_r($client->getHeaders());

设置一个域内重定向最多次数
$client = new HttpClient('www.amazon.com');
$client->setDebug(true);
$client->setMaxRedirects(3);
$client->get('/');