根据两个位置坐标重定向到特定页面-解网

问：

我正在尝试编写一个PHP页面，其中：

该页面将验证两个不同的坐标。第一个坐标将被硬编码。第二个坐标将基于用户的当前位置。
该页面将验证用户的当前位置是否为硬编码位置的 X 半径（以码为单位）。
如果用户的当前位置是 X >，那么距离硬编码位置 300 码，请重定向到此页面“允许.php。如果没有，请重定向到“拒绝.php”。

这是PHP脚本

<?php

/**
 * Calculate the Haversine distance between two points on the Earth's surface
 *
 * @param float $lat1 The latitude of the first point
 * @param float $lon1 The longitude of the first point
 * @param float $lat2 The latitude of the second point
 * @param float $lon2 The longitude of the second point
 * @return float The distance between the two points, in kilometers
 */
function haversine_distance($lat1, $lon1, $lat2, $lon2)
{
  $radius = 6371; // Earth's radius in kilometers

  // Calculate the differences in latitude and longitude
  $delta_lat = $lat2 - $lat1;
  $delta_lon = $lon2 - $lon1;

  // Calculate the central angles between the two points
  $alpha = $delta_lat / 2;
  $beta = $delta_lon / 2;

  // Use the Haversine formula to calculate the distance
  $a = sin(deg2rad($alpha)) * sin(deg2rad($alpha)) + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * sin(deg2rad($beta)) * sin(deg2rad($beta));
  $c = asin(min(1, sqrt($a)));
  $distance = 2 * $radius * $c;

  // Round the distance to four decimal places
  $distance = round($distance, 4);

  return $distance;
}

// Sample usage
$lat1 = 42.291093498546616;
$lon1 = -71.06439611612645;
$lat2 = 42.2707685745094;
$lon2 = -71.0237761587225;

$distance = haversine_distance($lat1, $lon1, $lat2, $lon2);
echo "The distance between ($lat1, $lon1) and ($lat2, $lon2) is $distance km.";

</php>

获取两个坐标：

<!DOCTYPE html>
<html>
<body>

<p>Click the button to get your coordinates.</p>

<button onclick="getLocation()">Try It</button>

<p id="demo"></p>

<script>
var x = document.getElementById("demo");

function getLocation() {
  if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(showPosition);
  } else { 
    x.innerHTML = "Geolocation is not supported by this browser.";
  }
}

function showPosition(position) {
  x.innerHTML = "Latitude: " + position.coords.latitude + 
  "<br>Longitude: " + position.coords.longitude;
}

function showError(error) {
  switch(error.code) {
    case error.PERMISSION_DENIED:
      x.innerHTML = "User denied the request for Geolocation."
      break;
    case error.POSITION_UNAVAILABLE:
      x.innerHTML = "Location information is unavailable."
      break;
    case error.TIMEOUT:
      x.innerHTML = "The request to get user location timed out."
      break;
    case error.UNKNOWN_ERROR:
      x.innerHTML = "An unknown error occurred."
      break;
  }
}

</script>

</body>
</html>

我似乎无法将这两个脚本拼凑在一起以根据需要工作。我是编码世界的新手，需要一些学习课程和技巧。请帮忙。非常感谢。

javascript php html 安全地理位置

function getLocation() {
  if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(showPosition);
  } else {
    x.innerHTML = "Geolocation is not supported by this browser.";
  }
}

function showPosition(position) {
  x.innerHTML = "Latitude: " + position.coords.latitude +
    "<br>Longitude: " + position.coords.longitude;

  var loc = {
    latitude: position.coords.latitude,
    longitude: position.coords.longitude
  }

  var data = JSON.stringify(loc);
  some_form.loc = data;
  some_form.submit();

}

<form id="some_form" action="radial-redirect.php">
  <input type="hidden" name="loc">
</form>

在服务器上：

// radial-redirect.php

$data = $_REQUEST['loc'];
$obj = json_decode($data, true);

$distance = haversine_distance($lat1, $lon1, $obj["latitude"], $obj["longtitude"]);

if ($distance > 40) {
  $newURL = "this.php";
} else {
  $newURL = "that.php";
}
header('Location: '.$newURL);

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根据两个位置坐标重定向到特定页面

Redirecting to a specific page based on two location coordinates

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