Huibin

import SystemConfiguration
      class func isConnectedToNetwork() -> Bool {      
        var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
        zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
        zeroAddress.sin_family = sa_family_t(AF_INET)
        let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
            SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0)).takeRetainedValue()
        }
        var flags: SCNetworkReachabilityFlags = 0
        if SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) == 0 {

Huibin

<?php

/**
   * @identify whether a point in polygon
   * @param p array of point, {x, y}
   * @param poly array of polygon
   * @return true or false
 */
function geoIn($point, $poly) {
    $px = $point[1];