大众点评网坐标转换

function decode($poi) {

$settings = array(

'digi'=> 16,

'add'=> 10,

'plus'=> 7,

'cha'=> 36,

'center'=> array(

'lat'=> 34.957995,

'lng'=> 107.050781,

'isDef'=> true

)

);

$i = -1;

$h = 0;

$b = "";

$j = strlen($poi);

$g = ord($poi{$j-1});

$c = substr($poi, 0, $j-1);

$j--;

 

for($e=0; $e<$j; $e++) {

$d = base_convert($c{$e}, $settings['cha'], 10)-$settings['add'];

if ($d>=$settings['add']) 

{

$d = $d- $settings['plus'];

}

$b .= base_convert($d, 10, $settings['cha']);

if ($d>$h) {

$i = $e;

$h = $d;

}

}

$a = intval(substr($b, 0, $i), $settings['digi']);

$f = intval(substr($b, $i+1), $settings['digi']);

$l = ($a+$f-intval($g))/2;

$k = ($f-$l)/100000;

$l /= 100000;

$lat = $k;

$lng = $l;

return array($lng, $lat);

}