Calcul de proximité (latitude/longitude)

[Melimelo]

Code PHP :

<?php



function Distance($latitude_A, $longitude_A, $latitude_B, $longitude_B)

{

    if($latitude_A == $latitude_B && $longitude_A == $longitude_B)

    {

        return 0;

    }

    else

    {

        $var = pi() / 180;

        

        $latitude1 = $latitude_A * $var;

        $latitude2 = $latitude_B * $var;

        

        $longitude1 = $longitude_A * $var;

        $longitude2 = $longitude_B * $var;    

        

        $X1 = sin($latitude1) * sin($latitude2);

        $X2 = cos($latitude1) * cos($latitude2);

        $X3 = cos($longitude1 - $longitude2);

        

        $X4 = $X2 * $X3;

        $X5 = $X1 + $X4;

        

        $Distance_radians = atan(-$X5/sqrt(-$X5*$X5 + 1)) + 2 * atan(1);

        

        return ($Distance_radians * 6366.8329383716631328393804536);

    }

}



print Distance(9.999999, 4.450382, 9.999999, 4.590779);

?>