php curl_init函数用法教程详解

// 初始化一个 cURL 对象
$curl = curl_init();
// 设置你需要抓取的URL
curl_setopt($curl, CURLOPT_URL, 'http://bbs.it-home.org');
// 设置header
curl_setopt($curl, CURLOPT_HEADER, 1);
// 设置cURL 参数，要求结果保存到字符串中还是输出到屏幕上。
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
// 运行cURL，请求网页
$data = curl_exec($curl);
// 关闭URL请求
curl_close($curl);
// 显示获得的数据
var_dump($data);
?>

例2，POST数据 sendSMS.php，其可以接受两个表单域，一个是电话号码，一个是短信内容。 POST数据

$phoneNumber　=　'13812345678';
$message　=　'This　message　was　generated　by　curl　and　php';
$curlPost　=　'pNUMBER='　.　urlencode($phoneNumber)　.　'&MESSAGE='　.　urlencode($message)　.　'&SUBMIT=Send';
$ch　=　curl_init();
curl_setopt($ch,　CURLOPT_URL,　'http://www.lxvoip.com/sendSMS.php');
curl_setopt($ch,　CURLOPT_HEADER,　1);
curl_setopt($ch,　CURLOPT_RETURNTRANSFER,　1);
curl_setopt($ch,　CURLOPT_POST,　1);
curl_setopt($ch,　CURLOPT_POSTFIELDS,　$curlPost);
$data　=　curl_exec();
curl_close($ch);
?>

例3，使用代理服务器。

$ch　=　curl_init();
curl_setopt($ch,　CURLOPT_URL,　'http://bbs.it-home.org');
curl_setopt($ch,　CURLOPT_HEADER,　1);
curl_setopt($ch,　CURLOPT_RETURNTRANSFER,　1);
curl_setopt($ch,　CURLOPT_HTTPPROXYTUNNEL,　1);
curl_setopt($ch,　CURLOPT_PROXY,　'proxy.lxvoip.com:1080');
curl_setopt($ch,　CURLOPT_PROXYUSERPWD,　'user:password');
$data　=　curl_exec();
curl_close($ch);
?>

例4，模拟登录。 Curl 模拟登录 discuz 程序,适合DZ7.0，将username改成自己的用户名，userpass改成自己密码。 Curl 模拟登录 discuz 程序

!extension_loaded('curl') && die('The curl extension is not loaded.');
$discuz_url = 'http://bbs.it-home.org';//论坛地址
$login_url = $discuz_url .'/logging.php?action=login';//登录页地址
$get_url = $discuz_url .'/my.php?item=threads'; //我的帖子
$post_fields = array();
//以下两项不需要修改
$post_fields['loginfield'] = 'username';
$post_fields['loginsubmit'] = 'true';
//用户名和密码，必须填写
$post_fields['username'] = 'lxvoip';
$post_fields['password'] = '88888888';
//安全提问
$post_fields['questionid'] = 0;
$post_fields['answer'] = '';
//@todo验证码
$post_fields['seccodeverify'] = '';
//获取表单FORMHASH
$ch = curl_init($login_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$contents = curl_exec($ch);
curl_close($ch);
preg_match('//i', $contents, $matches);
if(!empty($matches)) {
    $formhash = $matches[1];
} else {
    die('Not found the forumhash.');
}
//POST数据，获取COOKIE
$cookie_file = dirname(__FILE__) . '/cookie.txt';
//$cookie_file = tempnam('/tmp');
$ch = curl_init($login_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);
curl_exec($ch);
curl_close($ch);
//带着上面得到的COOKIE获取需要登录后才能查看的页面内容
$ch = curl_init($get_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
$contents = curl_exec($ch);
curl_close($ch);
var_dump($contents);