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Solutions to the problem that PHP positioning cannot be displayed on Tencent Maps

王林

Release： 2024-03-15 18:16:01

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Solutions to the problem that PHP positioning cannot be displayed on Tencent Maps

Solutions to PHP positioning that cannot be displayed on Tencent Maps

With the development of the mobile Internet, map positioning functions are increasingly used in various applications more common. As one of the well-known map service providers in China, Tencent Maps is also highly favored in terms of positioning services. During the development process, we sometimes encountered some problems, such as PHP positioning being unable to be displayed on Tencent Maps. This article will describe how to solve this problem and give specific code examples.

Problem Description

When using PHP to write the positioning function, sometimes the positioning is successful but cannot be displayed on Tencent Maps. This situation is usually because the latitude and longitude format returned by the positioning service does not meet the format requirements accepted by Tencent Maps, resulting in the inability to display the specific location on the map.

Solution

To solve the problem that PHP positioning cannot be displayed on Tencent Maps, the format of the longitude and latitude returned by the positioning needs to be processed to ensure that it meets the requirements of Tencent Maps. The following are specific solutions and code examples:

Get the positioning latitude and longitude

First, we need to use PHP to obtain the user's positioning latitude and longitude information. Here is an example of how to obtain the user's IP address:

$ip = $_SERVER['REMOTE_ADDR'];
$location = file_get_contents("http://ip.taobao.com/service/getIpInfo.php?ip=" . $ip);
$locationData = json_decode($location, true);
$longitude = $locationData['data']['longitude'];
$latitude = $locationData['data']['latitude'];

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Convert latitude and longitude format

The latitude and longitude format accepted by Tencent Map is Degrees, minutes and seconds format, so the obtained longitude and latitude need to be converted into degrees, minutes and seconds format. Here is a simple conversion function:

function convertDMS($decimal) {
    $degrees = floor($decimal);
    $minutes = floor(($decimal - $degrees) * 60);
    $seconds = ($decimal - $degrees - ($minutes / 60)) * 3600;
    return $degrees . "°" . $minutes . "'" . $seconds . "''";
}

$longitude_dms = convertDMS($longitude);
$latitude_dms = convertDMS($latitude);

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Display location on Tencent map

Finally, pass the converted latitude and longitude data to Tencent Map API to display locations on a map:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Display location</title>
    <script src="http://map.qq.com/api/js?v=2.exp"></script>
</head>
<body>
    <div id="map" style="width: 100%; height: 600px;"></div>
    <script>
        var map = new qq.maps.Map(document.getElementById("map"), {
            center: new qq.maps.LatLng(<?php echo $latitude ?>, <?php echo $longitude ?>),
            zoom: 15
        });

        var marker = new qq.maps.Marker({
            position: map.getCenter(),
            map: map
        });
    </script>
</body>
</html>

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Conclusion

Through the above steps, you can successfully solve the problem that PHP positioning cannot be displayed on Tencent Maps. In actual development, the code can be appropriately adjusted and optimized according to specific needs and situations. I hope the content of this article can help developers with similar problems and successfully implement the function of displaying positioning information on Tencent Maps.

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