/**
* Serialize geometries into an EWKB binary string.
*
* @param Geometry $geometry
*
* @return string The Extended-WKB binary string representation of the input geometries
*/
public function write(Geometry $geometry, $write_as_hex = FALSE)
{
// We always write into NDR (little endian)
$wkb = pack('c', 1);
switch ($geometry->getGeomType()) {
case 'Point':
$wkb .= pack('L', 1);
$wkb .= $this->writePoint($geometry);
break;
case 'LineString':
$wkb .= pack('L', 2);
$wkb .= $this->writeLineString($geometry);
break;
case 'Polygon':
$wkb .= pack('L', 3);
$wkb .= $this->writePolygon($geometry);
break;
case 'MultiPoint':
$wkb .= pack('L', 4);
$wkb .= $this->writeMulti($geometry);
break;
case 'MultiLineString':
$wkb .= pack('L', 5);
$wkb .= $this->writeMulti($geometry);
break;
case 'MultiPolygon':
$wkb .= pack('L', 6);
$wkb .= $this->writeMulti($geometry);
break;
case 'GeometryCollection':
$wkb .= pack('L', 7);
$wkb .= $this->writeMulti($geometry);
break;
}
if ($write_as_hex) {
$unpacked = unpack('H*', $wkb);
return $unpacked[1];
} else {
return $wkb;
}
}
