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Home php教程 php手冊 Verify that coordinates are within a certain coordinate area php code

Verify that coordinates are within a certain coordinate area php code

Oct 08, 2016 pm 04:04 PM

I encountered a need before. It was necessary to display the company's services on a map, and to count the daily access coordinates of users to see how many users were within the reachable service radius.

The following is the implementation of the PHP code (only verify that the coordinates are within a certain coordinate area)

<?<span style="color: #000000;">php
</span><span style="color: #008000;">/*</span><span style="color: #008000;">*
 * 驗證坐標(biāo)點是否在某區(qū)域內(nèi)
 * @author xiaoliang <1058436713@qq.com>
 * Class validationMap
 <span style="color: #008000;">*/</span>
<span style="color: #0000ff;">class</span><span style="color: #000000;"> validationMap{
    </span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #800080;">$coordArray</span><span style="color: #000000;">;
    </span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #800080;">$vertx</span> =<span style="color: #000000;"> [];
    </span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #800080;">$verty</span> =<span style="color: #000000;"> [];
    </span><span style="color: #008000;">/*</span><span style="color: #008000;">*
     * 設(shè)置坐標(biāo)區(qū)域
     * @param mixed $coordArray
     </span><span style="color: #008000;">*/</span>
    <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">function</span> setCoordArray(<span style="color: #0000ff;">array</span> <span style="color: #800080;">$coordArray</span><span style="color: #000000;">)
    {
        self</span>::<span style="color: #800080;">$coordArray</span> = <span style="color: #800080;">$coordArray</span><span style="color: #000000;">;
    }
    </span><span style="color: #008000;">/*</span><span style="color: #008000;">*
     * 驗證區(qū)域范圍
     * @param array $coordArray
     * @return bool
     </span><span style="color: #008000;">*/</span>
    <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">function</span> isCityCenter(<span style="color: #0000ff;">array</span> <span style="color: #800080;">$coordArray</span><span style="color: #000000;">){
        </span><span style="color: #0000ff;">if</span>(!self::vaildatePoint(<span style="color: #800080;">$coordArray</span><span style="color: #000000;">)){
            </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;
        }
        </span><span style="color: #0000ff;">return</span> self::pnpoly(<span style="color: #008080;">count</span>(self::<span style="color: #800080;">$coordArray</span>), <span style="color: #800080;">$coordArray</span>['lng'], <span style="color: #800080;">$coordArray</span>['lat'<span style="color: #000000;">]);
    }
    </span><span style="color: #008000;">/*</span><span style="color: #008000;">*
     * 比較區(qū)域坐標(biāo)
     * @param $nvert
     * @param $testx
     * @param $testy
     * @return bool
     </span><span style="color: #008000;">*/</span>
    <span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">function</span> pnpoly(<span style="color: #800080;">$nvert</span>,<span style="color: #800080;">$testx</span>, <span style="color: #800080;">$testy</span><span style="color: #000000;">)
    {
        </span><span style="color: #800080;">$c</span> = <span style="color: #0000ff;">false</span><span style="color: #000000;">;
        </span><span style="color: #0000ff;">for</span> (<span style="color: #800080;">$i</span> = 0, <span style="color: #800080;">$j</span> = <span style="color: #800080;">$nvert</span>-1; <span style="color: #800080;">$i</span> < <span style="color: #800080;">$nvert</span>; <span style="color: #800080;">$j</span> = <span style="color: #800080;">$i</span>++<span style="color: #000000;">) {
            </span><span style="color: #0000ff;">if</span> ( ( (self::<span style="color: #800080;">$verty</span>[<span style="color: #800080;">$i</span>]><span style="color: #800080;">$testy</span>) != (self::<span style="color: #800080;">$verty</span>[<span style="color: #800080;">$j</span>]><span style="color: #800080;">$testy</span>) ) && (<span style="color: #800080;">$testx</span> < (self::<span style="color: #800080;">$vertx</span>[<span style="color: #800080;">$j</span>]-self::<span style="color: #800080;">$vertx</span>[<span style="color: #800080;">$i</span>]) * (<span style="color: #800080;">$testy</span>-self::<span style="color: #800080;">$verty</span>[<span style="color: #800080;">$i</span>]) / (self::<span style="color: #800080;">$verty</span>[<span style="color: #800080;">$j</span>]-self::<span style="color: #800080;">$verty</span>[<span style="color: #800080;">$i</span>]) + self::<span style="color: #800080;">$vertx</span>[<span style="color: #800080;">$i</span><span style="color: #000000;">]) )
                </span><span style="color: #800080;">$c</span> = !<span style="color: #800080;">$c</span><span style="color: #000000;">;
        }
        </span><span style="color: #0000ff;">return</span> <span style="color: #800080;">$c</span><span style="color: #000000;">;
    }
    </span><span style="color: #008000;">/*</span><span style="color: #008000;">*
     * 驗證坐標(biāo)
     * @param array $pointArray
     * @return bool
     </span><span style="color: #008000;">*/</span>
    <span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">function</span> vaildatePoint(<span style="color: #0000ff;">array</span> <span style="color: #800080;">$pointArray</span><span style="color: #000000;">){
        </span><span style="color: #800080;">$maxY</span> = <span style="color: #800080;">$maxX</span> = 0<span style="color: #000000;">;
        </span><span style="color: #800080;">$minY</span> = <span style="color: #800080;">$minX</span> = 9999<span style="color: #000000;">;
        </span><span style="color: #0000ff;">foreach</span> (self::<span style="color: #800080;">$coordArray</span> <span style="color: #0000ff;">as</span> <span style="color: #800080;">$item</span><span style="color: #000000;">){
            </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$item</span>['lng']><span style="color: #800080;">$maxX</span>) <span style="color: #800080;">$maxX</span> = <span style="color: #800080;">$item</span>['lng'<span style="color: #000000;">];
            </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$item</span>['lng'] < <span style="color: #800080;">$minX</span>) <span style="color: #800080;">$minX</span> = <span style="color: #800080;">$item</span>['lng'<span style="color: #000000;">];
            </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$item</span>['lat']><span style="color: #800080;">$maxY</span>) <span style="color: #800080;">$maxY</span> = <span style="color: #800080;">$item</span>['lat'<span style="color: #000000;">];
            </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$item</span>['lat'] < <span style="color: #800080;">$minY</span>) <span style="color: #800080;">$minY</span> = <span style="color: #800080;">$item</span>['lat'<span style="color: #000000;">];
            self</span>::<span style="color: #800080;">$vertx</span>[] = <span style="color: #800080;">$item</span>['lng'<span style="color: #000000;">];
            self</span>::<span style="color: #800080;">$verty</span>[] = <span style="color: #800080;">$item</span>['lat'<span style="color: #000000;">];
        }
        </span><span style="color: #0000ff;">if</span> (<span style="color: #800080;">$pointArray</span>['lng'] < <span style="color: #800080;">$minX</span> || <span style="color: #800080;">$pointArray</span>['lng'] > <span style="color: #800080;">$maxX</span> || <span style="color: #800080;">$pointArray</span>['lat'] < <span style="color: #800080;">$minY</span> || <span style="color: #800080;">$pointArray</span>['lat'] > <span style="color: #800080;">$maxY</span><span style="color: #000000;">) {
            </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;
        }
        </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">true</span><span style="color: #000000;">;
    }
}<br>/**************************** test *************************************/
</span><span style="color: #800080;">$map</span> = [  <span style="color: #008000;">//</span><span style="color: #008000;">上海</span>
    ["lng" => 121.488286, "lat" => 31.420147],<span style="color: #000000;">
    [</span>"lng" => 121.702154, "lat" => 31.294828],<span style="color: #000000;">
    [</span>"lng" => 121.780918, "lat" => 31.141157],<span style="color: #000000;">
    [</span>"lng" => 121.782068, "lat" => 30.941157],<span style="color: #000000;">
    [</span>"lng" => 121.492885, "lat" => 30.909931],<span style="color: #000000;">
    [</span>"lng" => 121.22325, "lat" => 30.890099],<span style="color: #000000;">
    [</span>"lng" => 121.161482, "lat" => 31.015526],<span style="color: #000000;">
    [</span>"lng" => 121.076395, "lat" => 31.226239],<span style="color: #000000;">
    [</span>"lng" => 121.189873, "lat" => 31.339688],<span style="color: #000000;">
    [</span>"lng" => 121.459509, "lat" => 31.41368],<span style="color: #000000;">
];
</span><span style="color: #800080;">$array</span> = ["lat"=>31.218681,"lng"=>121.08604];<span style="color: #008000;">//</span><span style="color: #008000;">進行驗證的區(qū)域</span>
validationMap::setCoordArray(<span style="color: #800080;">$map</span><span style="color: #000000;">);
</span><span style="color: #008080;">var_dump</span>(validationMap::isCityCenter(<span style="color: #800080;">$array</span>));

Use in map:

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