29 lines
913 B
PHP
Executable File
29 lines
913 B
PHP
Executable File
<?php
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namespace app\service;
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class Location
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{
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const EARTH_RADIUS = 6378.137;//地球半径 公里
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/**
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* 计算两组经纬度坐标 之间的距离
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* params ：lat1 纬度1； lng1 经度1； lat2 纬度2； lng2 经度2； len_type （1:m or 2:km);
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* return m or km
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*/
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public static function getDistance($lat1, $lng1, $lat2, $lng2, $len_type = 1, $decimal = 2): float
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{
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$pi = pi();
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$radLat1 = $lat1 * $pi / 180.0;
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$radLat2 = $lat2 * $pi / 180.0;
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$a = $radLat1 - $radLat2;
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$b = ($lng1 * $pi / 180.0) - ($lng2 * $pi / 180.0);
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$s = 2 * asin(sqrt(pow(sin($a / 2), 2) + cos($radLat1) * cos($radLat2) * pow(sin($b / 2), 2)));
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$s = $s * self::EARTH_RADIUS;
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$s = round($s * 1000);
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if ($len_type > 1) {
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$s /= 1000;
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}
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return round($s, $decimal);
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}
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} |