/**
 +------------------------------------------------------------------------------------+
 + 功能：获取用户真实IP
 + 网址：https://www.uzjz.com
 +------------------------------------------------------------------------------------+
 + @return string
 +------------------------------------------------------------------------------------+
 */
function ip(){
	static $realip;
	if (isset($_SERVER)) {
		if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
			$realip = $_SERVER['HTTP_X_FORWARDED_FOR'];
		} else {
			$realip = isset($_SERVER['HTTP_CLIENT_IP'])?$_SERVER['HTTP_CLIENT_IP']:$_SERVER['REMOTE_ADDR'];
		}
	} else {
		if (getenv('HTTP_X_FORWARDED_FOR')) {
			$realip = getenv('HTTP_X_FORWARDED_FOR');
		} else {
			$realip = getenv('HTTP_CLIENT_IP')?getenv('HTTP_CLIENT_IP'):getenv('REMOTE_ADDR');
		}
	}
	return $realip;
}
/**
 +------------------------------------------------------------------------------------+
 + 功能：通过一个 HTTPS POST 请求获取内容
 +------------------------------------------------------------------------------------+
 + @param  $url      {string}    完整的网址
 + @param  $post     {string}    POST 内容，格式：username=Jack&password=123465
 + @param  $cookie   {string}    COOKIE 数据，格式：username=Jack&password=123456
 + @param  $timeout  {int}       请求超时
 + @param  $times    {int}       重试次数
 + @return string
 +------------------------------------------------------------------------------------+
 */
function postHttps($url, $post = '', $cookie = '', $timeout = 30, $times = 1, $method = 'POST') {
	if(substr($url, 0, 7) == 'http://') return postHttp($url, $post, $cookie, $timeout, $times);
	is_array($post) AND $post = http_build_query($post);
	is_array($cookie) AND $cookie = http_build_query($cookie);
	$w = stream_get_wrappers();
	$allow_url_fopen = strtolower(ini_get('allow_url_fopen'));
	$allow_url_fopen = (empty($allow_url_fopen) || $allow_url_fopen == 'off') ? 0 : 1;
	if (!function_exists('curl_init')) {
		return message(-1, 'server not installed curl.');
	}
	$ch = curl_init();
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_HEADER, 2); // 1/2
	curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-type: application/x-www-form-urlencoded', 'x-requested-with: XMLHttpRequest'));
	curl_setopt($ch, CURLOPT_URL, $url);
	curl_setopt($ch, CURLOPT_USERAGENT, _SERVER('HTTP_USER_AGENT'));
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); // 对认证证书来源的检查
	curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2); // 从证书中检查SSL加密算法是否存在，默认可以省略
	if($method == 'POST') {
		curl_setopt($ch, CURLOPT_POST, 1);
		curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
	}
	$header = array('Content-type: application/x-www-form-urlencoded', 'X-Requested-With: XMLHttpRequest');
	if($cookie) {
		$header[] = "Cookie: $cookie";
	}
	curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
	(!ini_get('safe_mode') && !ini_get('open_basedir')) && curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); // 使用自动跳转, 安全模式不允许
	curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
	$data = curl_exec($ch);
	if(curl_errno($ch)) {
		return message(-1, 'Errno'.curl_error($ch));
	}
	if(!$data) {
		curl_close($ch);
		return '';
	}
	list($header, $data) = explode("\r\n\r\n", $data);
	$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
	if($http_code == 301 || $http_code == 302) {
		$matches = array();
		preg_match('/Location:(.*?)\n/', $header, $matches);
		$url = trim(array_pop($matches));
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_HEADER, false);
		$data = curl_exec($ch);
	}
	curl_close($ch);
	return $data;
}