地理编码，从地址到坐标

Posted 2021-02-25

// ------------------------------------------
// converts a string with a stret address
// into a couple of lat, long coordinates.
// ------------------------------------------
public function getLatLong($address){
	if (!is_string($address))die("All Addresses must be passed as a string");
	$_url = sprintf('http://maps.google.com/maps?output=js&q=%s',rawurlencode($address));
	$_result = false;
	if($_result = file_get_contents($_url)) {
		if(strpos($_result,'errortips') > 1 || strpos($_result,'Did you mean:') !== false) return false;
		preg_match('!center:s*{lat:s*(-?d+.d+),lng:s*(-?d+.d+)}!U', $_result, $_match);
		$_coords['lat'] = $_match[1];
		$_coords['long'] = $_match[2];
	}
	return $_coords;
}