Polyline Decode

// Decode points to lat/long array
// Author: Ian Dees 2005
// Help from: http://www.thrall.net/~mking/maps/points.py
function decodePolyline( $a ) {
    $b = strlen($a);
    $c = 0;
    $d = Array();
    $e = 0;
    $f = 0;

    while($c < $b) {
        $g = 0;
        $h = 0;
        $i = 0;

        do {
            $g = ord(substr($a,$c++,1)) - 63;
            $i |= ($g & 31) << $h;
            $h += 5;
        } while($g >= 32);

        $k = $i & 1 ? ~($i >> 1) : $i >> 1;
        $e += $k;
        $h = 0;
        $i = 0;

        do {
            $g = ord(substr($a,$c++,1)) - 63;
            $i |= ($g & 31) << $h;
            $h += 5;
        } while($g >= 32);

        $l = $i & 1 ? ~($i >> 1) : $i >> 1;
        $f += $l;
        array_push($d, Array('lat' => $e*1.0E-5, 'lon' => $f*1.0E-5));
    }
    return $d;
}