PHP uses Redis's GEO (geographic location) command-PHP Tutorial-php.cn

PHP uses Redis's GEO (geographic location) command

藏色散人

Release： 2023-04-06 14:52:01

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Redis has added support for GEO (geographic location) since version 3.2, but the earth is not a perfect sphere, and the deviation may be 0.5% in the worst case. Areas close to the poles are not supported. The valid longitude of supported coordinates is from -180 degrees to 180 degrees; the valid latitude is from -85.05112878 degrees to 85.05112878 degrees. If it exceeds the range, an error will be reported.

PHP uses Redis's GEO (geographic location) command

I like to climb mountains. When I was learning GEO, I also used the coordinates of mountains to demonstrate. My coordinates are:

116.517159,39.922267

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I compiled some mountain coordinates Coordinates

$mountainCoordinates = array(
    array(&#39;115.793844&#39;, &#39;40.584459&#39;, &#39;Hai_tuo&#39;),//海陀山坐标
    array(&#39;115.056232&#39;, &#39;39.948933&#39;, &#39;Small_wutai&#39;),//小五台山坐标
    array(&#39;114.173822&#39;, &#39;27.474563&#39;, &#39;Wu_gong&#39;),//武功山坐标
    array(&#39;111.341648&#39;, &#39;25.518178&#39;, &#39;Leek_ridge&#39;),//韭菜岭坐标
    array(&#39;103.901761&#39;, &#39;31.60487&#39;, &#39;Jiu_ding&#39;),//九顶山坐标
    array(&#39;107.398009&#39;, &#39;34.057777&#39;, &#39;Ao_Shan&#39;),//鳌山坐标
);

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1. Add coordinates to the key of mountainCoordinates

try {
    $redis = new Redis();
    $redis->connect(&#39;192.168.75.132&#39;, 6379);
    foreach ($mountainCoordinates as $coordinates){
        $param = array(&#39;geoadd&#39;, &#39;mountainCoordinates&#39;);
        $param = array_merge($param, $coordinates);
        $ret = call_user_func_array(array($redis, &#39;rawCommand&#39;), $param);
        print_r($ret);
    }
} catch (Exception $e){
    echo $e->getMessage();
}

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Execution results

int(1)
int(1)
int(1)
int(1)
int(1)
int(1)

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2. Get coordinates

try {
    $redis = new Redis();
    $redis->connect(&#39;192.168.75.132&#39;, 6379);
    $param = array(&#39;geopos&#39;, &#39;mountainCoordinates&#39;, &#39;Hai_tuo&#39;, &#39;Wu_gong&#39;, &#39;Jiu_ding&#39;);
    $ret = call_user_func_array(array($redis, &#39;rawCommand&#39;), $param);
    print_r($ret);
} catch (Exception $e){
    echo $e->getMessage();
}

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Execution result

Array
(
    [0] => Array
        (
            [0] => 115.79384654760360718
            [1] => 40.58445845049069334
        )
    [1] => Array
        (
            [0] => 114.1738244891166687
            [1] => 27.47456377424472151
        )
    [2] => Array
        (
            [0] => 103.90176326036453247
            [1] => 31.60486909089710394
        )
)

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3. Calculate the distance between two coordinates

try {
    $redis = new Redis();
    $redis->connect(&#39;192.168.75.132&#39;, 6379);
    $param = array(&#39;geodist&#39;, &#39;mountainCoordinates&#39;, &#39;Hai_tuo&#39;, &#39;Small_wutai&#39;, &#39;km&#39;);
    $ret = call_user_func_array(array($redis, &#39;rawCommand&#39;), $param);
    var_dump($ret);
} catch (Exception $e){
    echo $e->getMessage();
}

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Execution result: The distance between Haituo Mountain and Xiaowutai Mountain is 94.4219km

string(7) "94.4219"

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4. Take my coordinates as the origin and get the coordinates according to the radius of 100km (find the mountains within 100 kilometers from me)

try {
    $redis = new Redis();
    $redis->connect(&#39;192.168.75.132&#39;, 6379);
    $param = array(&#39;georadius&#39;, &#39;mountainCoordinates&#39;, &#39;116.517159&#39;, &#39;39.922267&#39;, &#39;100&#39;, &#39;km&#39;, &#39;WITHDIST&#39;, &#39;WITHCOORD&#39;);
    $ret = call_user_func_array(array($redis, &#39;rawCommand&#39;), $param);
    print_r($ret);
} catch (Exception $e){
    echo $e->getMessage();
}

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Execution result: only the sea Tuoshan, 95.8884km away from me

Array
(
    [0] => Array
        (
            [0] => Hai_tuo
            [1] => 95.8884
            [2] => Array
                (
                    [0] => 115.79384654760360718
                    [1] => 40.58445845049069334
                )
        )
)

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5. Take my coordinates as the origin and take the coordinates according to the radius of 1500km (find the mountains within 1500 kilometers from me)

try {
    $redis = new Redis();
    $redis->connect(&#39;192.168.75.132&#39;, 6379);
    $param = array(&#39;georadius&#39;, &#39;mountainCoordinates&#39;, &#39;116.517159&#39;, &#39;39.922267&#39;, &#39;1500&#39;, &#39;km&#39;, &#39;WITHDIST&#39;, &#39;WITHCOORD&#39;);
    $ret = call_user_func_array(array($redis, &#39;rawCommand&#39;), $param);
    print_r($ret);
} catch (Exception $e){
    echo $e->getMessage();
}

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Execution result: 5 mountains found

Array
(
    [0] => Array
        (
            [0] => Jiu_ding
            [1] => 1464.4350
            [2] => Array
                (
                    [0] => 103.90176326036453247
                    [1] => 31.60486909089710394
                )
        )
    [1] => Array
        (
            [0] => Ao_Shan
            [1] => 1039.1217
            [2] => Array
                (
                    [0] => 107.3980066180229187
                    [1] => 34.05777705537607147
                )
        )
    [2] => Array
        (
            [0] => Wu_gong
            [1] => 1401.2353
            [2] => Array
                (
                    [0] => 114.1738244891166687
                    [1] => 27.47456377424472151
                )
        )
    [3] => Array
        (
            [0] => Small_wutai
            [1] => 124.6283
            [2] => Array
                (
                    [0] => 115.05623370409011841
                    [1] => 39.94893288365195616
                )
        )
    [4] => Array
        (
            [0] => Hai_tuo
            [1] => 95.8884
            [2] => Array
                (
                    [0] => 115.79384654760360718
                    [1] => 40.58445845049069334
                )
        )
)

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6. Take the coordinates of Xiaowutai Mountain as the origin, and take the coordinates according to a radius of 1000km (find the mountains within 1000 kilometers from Xiaowutai Mountain)

try {
    $redis = new Redis();
    $redis->connect(&#39;192.168.75.132&#39;, 6379);
    $param = array(&#39;georadiusbymember&#39;, &#39;mountainCoordinates&#39;, &#39;Small_wutai&#39;, &#39;1000&#39;, &#39;km&#39;, &#39;WITHDIST&#39;, &#39;WITHCOORD&#39;);
    $ret = call_user_func_array(array($redis, &#39;rawCommand&#39;), $param);
    print_r($ret);
} catch (Exception $e){
    echo $e->getMessage();
}

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Execution result: Excluding Xiaowutai itself, Aoshan and Haituo Mountain were found

Array
(
    [0] => Array
        (
            [0] => Small_wutai
            [1] => 0.0000
            [2] => Array
                (
                    [0] => 115.05623370409011841
                    [1] => 39.94893288365195616
                )
        )
    [1] => Array
        (
            [0] => Hai_tuo
            [1] => 94.4219
            [2] => Array
                (
                    [0] => 115.79384654760360718
                    [1] => 40.58445845049069334
                )
        )
    [2] => Array
        (
            [0] => Ao_Shan
            [1] => 943.7873
            [2] => Array
                (
                    [0] => 107.3980066180229187
                    [1] => 34.05777705537607147
                )
        )
)

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