PHP 騰訊與百度座標轉換

/**
 * 騰訊轉百度座標轉換
 * @param $a Latitude
 * @param $b Longitude
 * @return array
 */
function coordinate_switchf($a, $b)//騰訊轉百度座標轉換  $a = Latitude , $b = Longitude
{
    $x = (double)$b ;
    $y = (double)$a;
    $x_pi = 3.14159265358979324*3000/180;
    $z = sqrt($x * $x+$y * $y) + 0.00002 * sin($y * $x_pi);
    $theta = atan2($y,$x) + 0.000003 * cos($x*$x_pi);
    $gb = number_format($z * cos($theta) + 0.0065,6);
    $ga = number_format($z * sin($theta) + 0.006,6);
    return ['lat' => $ga, 'lng' => $gb];
}

/**
 * 百度轉騰訊座標轉換
 * @param $a Latitude
 * @param $b Latitude
 * @return array
 */
function coordinate_switch($a,$b)//百度轉騰訊座標轉換  $a = Latitude , $b = Latitude
{
    $x = (double)$b - 0.0065;
    $y = (double)$a - 0.006;
    $x_pi = 3.14159265358979324*3000/180;
    $z = sqrt($x * $x+$y * $y) - 0.00002 * sin($y * $x_pi);
    $theta = atan2($y,$x) - 0.000003 * cos($x*$x_pi);
    $gb = number_format($z * cos($theta),15);
    $ga = number_format($z * sin($theta),15);
    return ['Latitude'=>$ga,'Longitude'=>$gb];
}