diff --git a/includes/functions.php b/includes/functions.php
index ba6c48a..7cb84be 100755
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -1,87 +1,113 @@
 <?php
 /*
  * Italian petrol pumps comparator - Project born (and winner) at hackaton Facile.it 2015
  * Copyright (C) 2015 Valerio Bozzolan, Marcelino Franchini, Fabio Mottan, Alexander Bustamente, Cesare de Cal, Edoardo de Cal
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU Affero General Public License for more details.
  *
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 /**
  * It does what it's written.
  *
  * @param float $latitude1
  * @param float $longitude1
  * @param float $latitude2
  * @param float $longitude2
  * @return float Meters
  */
 function get_distance_between_coordinates($latitude1, $longitude1, $latitude2, $longitude2)  {
 	$theta = $longitude1 - $longitude2;
 	$distance = sin(deg2rad($latitude1)) * sin(deg2rad($latitude2)) + (
 		cos(deg2rad($latitude1)) * cos(deg2rad($latitude2)) * cos(deg2rad($theta))
 	);
 	$distance = acos($distance);
 	$distance = rad2deg($distance) * 60 * 1.1515;
 	$distance = $distance * 1609.344; // To meters
 	return $distance;
 }
 
 function get_in_touch($url, $who) {
 	return HTML::a($url, mdi_icon('perm_contact_calendar') . _("Entra in contatto"), sprintf( _("Mettiti in contatto con %s"), $who ), 'waves-effect waves-teal btn');
 }
 
 function legal_notes($url, $license, $project) {
 	return HTML::a($url, $license, sprintf( _("Informazioni legali su %s"), $project ) );
 }
 
 /**
  * Material Design Icon
  */
 function mdi_icon($uid, $class = 'left') {
 	return "<i class=\"material-icons $class\">$uid</i>";
 }
 
 /**
  * Run GNU Gettext
  */
 function gettext_rocks($lang = 'it_IT', $domain = 'fuel.reyboz.it', $folder = 'l10n', $encoding = 'UTF-8') {
 	putenv("LANG=$lang.$encoding");
 	setlocale(LC_MESSAGES, "$lang.$encoding");
 	bindtextdomain($domain, $folder);
 	textdomain($domain);
 	bind_textdomain_codeset($domain, $encoding);
 }
 
 /**
  * Get the last update price.
  *
  * Has a cache.
  *
  * @param string $format DateTime format.
  * @return string Formatted date.
  */
 function last_price_date($format = 'd/m/Y H:i') {
 	static $lastdate = null;
 
 	if($lastdate === null) {
 		$lastdate = query_value(
 			"SELECT MAX(price_date) AS lastdate FROM {$GLOBALS[T]('price')}",
 			'lastdate'
 		);
 	}
 
 	$d = DateTime::createFromFormat('Y-m-d H:i:s', $lastdate);
 
 	return $d->format($format);
 }
+
+/**
+ * Get either a Gravatar URL or complete image tag for a specified email address.
+ *
+ * @param string $email The email address
+ * @param string $s Size in pixels, defaults to 80px [ 1 - 2048 ]
+ * @param string $d Default imageset to use [ 404 | mm | identicon | monsterid | wavatar ]
+ * @param string $r Maximum rating (inclusive) [ g | pg | r | x ]
+ * @param boole $img True to return a complete IMG tag False for just the URL
+ * @param array $atts Optional, additional key/value attributes to include in the IMG tag
+ * @return String containing either just a URL or a complete image tag
+ * @source http://gravatar.com/site/implement/images/php/
+ */
+function get_gravatar($email, $s = 80, $d = 'mm', $r = 'g', $img = false, $atts = array() ) {
+	$url = '//www.gravatar.com/avatar/';
+	$url .= md5( strtolower( trim( $email ) ) );
+	$url .= "?s=$s&amp;d=$d&amp;r=$r";
+	if($img) {
+		$url = '<img src="' . $url . '"';
+		foreach($atts as $key => $val) {
+			$url .= ' ' . $key . '="' . $val . '"';
+		}
+		$url .= ' />';
+	}
+	return $url;
+}