使用Haversine公式来训练PHP中两个邮政编码之间的距离

时间:2016-03-25 08:39:57

标签: php mysql distance latitude-longitude

我试图在php中使用Haversine Formula来计算两个邮政编码之间的距离;到目前为止,我已经创建了一个函数来计算距离。我的数据库表名为'postcode',字段'postcode_id','postcode','lat','lng'。

    <script>
function getDistance($latitude1, $longitude1, $latitude2, $longitude2) {  
    $earth_radius = 6371;  

    $postLat = deg2rad($latitude2 - $latitude1);  
    $postLon = deg2rad($longitude2 - $longitude1);  

    $a = sin($postLat/2) * sin($postLat/2) + cos(deg2rad($latitude1)) * cos(deg2rad($latitude2)) * sin($postLon/2) * sin($postLon/2);  
    $c = 2 * asin(sqrt($a));  
    $d = $earth_radius * $c;  

    return $d; 
}
</script>

<?php
$postcode_qry = mysqli_query($connect, "SELECT *,(((acos(sin((".$postLat."*pi()/180)) * sin(('lat'*pi()/180))+cos((".$postLat."*pi()/180)) * cos(('lat'*pi()/180)) * cos(((".$postLon."- 'lng')*pi()/180))))*180/pi())*60*1.1515) as distance
FROM `postcode` WHERE distance = ".$d."");

?>

1 个答案:

答案 0 :(得分:1)

您可以使用Google服务申请:

    function getLongLat($address) {
        $url = 'http://maps.googleapis.com/maps/api/geocode/xml?sensor=false&language=nl&address='+$address;

        $ch = curl_init();  
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $response = curl_exec($ch);
        curl_close($ch);  
        $obj = simplexml_load_string($response);
        if ($obj) {
            $obj = $obj->result;
            return array( 'latitude' => $obj->geometry->location->lat.'', 'longitude' => $obj->geometry->location->lng.'',);
        }else{
            return [];
        } 

   }

Google会尝试为您解析地址,猜测postal code, Country应该对您有用,并且您可以将所需数据传递给MySQL函数