驗證坐標在某片坐標區(qū)域內(nèi) php 代碼
Oct 08, 2016 pm 04:04 PM
之前碰到的這樣一個需求，要將公司的服務(wù)在地圖中顯示出來，并將用戶每天的訪問坐標進行統(tǒng)計看有多少用戶是在所能達到的服務(wù)范圍半徑內(nèi)。
以下是PHP代碼的實現(xiàn) (僅驗證坐標在某片坐標區(qū)域內(nèi))
<span style="color: #000000;">php
</span><span style="color: #008000;">/*</span><span style="color: #008000;">*
* 驗證坐標點是否在某區(qū)域內(nèi)
* @author xiaoliang
* Class validationMap
</span><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
* @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> $nvert; <span style="color: #800080;">$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> $vertx[<span style="color: #800080;">$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
* @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'] $minX) <span style="color: #800080;">$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'] $minY) <span style="color: #800080;">$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'] $minX || <span style="color: #800080;">$pointArray</span>['lng'] > <span style="color: #800080;">$maxX</span> || <span style="color: #800080;">$pointArray</span>['lat'] $minY || <span style="color: #800080;">$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>));
在地圖中的運用：
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