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php计算两个坐标(经度,纬度)之间距离的方法_php技巧

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Release: 2016-05-16 20:17:22
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本文实例讲述了php计算两个坐标(经度,纬度)之间距离的方法。分享给大家供大家参考。具体如下:

这里使用php计算两个坐标(经度,纬度)之间的距离,返回结果为米或者千米

function distance($lat1, $lng1, $lat2, $lng2, $miles = true)
{
 $pi80 = M_PI / 180;
 $lat1 *= $pi80;
 $lng1 *= $pi80;
 $lat2 *= $pi80;
 $lng2 *= $pi80;
 $r = 6372.797; // mean radius of Earth in km
 $dlat = $lat2 - $lat1;
 $dlng = $lng2 - $lng1;
 $a = sin($dlat/2)*sin($dlat/2)+cos($lat1)*cos($lat2)*sin($dlng/2)*sin($dlng/2);
 $c = 2 * atan2(sqrt($a), sqrt(1 - $a));
 $km = $r * $c;
 return ($miles ? ($km * 0.621371192) : $km);
}
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希望本文所述对大家的php程序设计有所帮助。

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