From 828ae671f049b488c5154d364dab8eb9f236d4ea Mon Sep 17 00:00:00 2001
From: Michael <heluecht@pirati.ca>
Date: Tue, 18 Apr 2017 18:50:01 +0000
Subject: [PATCH] Handle the case when the given contact url or address is
 empty

---
 include/Contact.php | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/Contact.php b/include/Contact.php
index 4e86b32977..6f662cdf15 100644
--- a/include/Contact.php
+++ b/include/Contact.php
@@ -212,6 +212,10 @@ function unmark_for_death($contact) {
 function get_contact_details_by_url($url, $uid = -1, $default = array()) {
 	static $cache = array();
 
+	if ($url == '') {
+		return $default;
+	}
+
 	if ($uid == -1) {
 		$uid = local_user();
 	}
@@ -328,6 +332,10 @@ function get_contact_details_by_url($url, $uid = -1, $default = array()) {
 function get_contact_details_by_addr($addr, $uid = -1) {
 	static $cache = array();
 
+	if ($addr == '') {
+		return array();
+	}
+
 	if ($uid == -1) {
 		$uid = local_user();
 	}
@@ -534,6 +542,10 @@ function get_contact($url, $uid = 0, $no_update = false) {
 	$data = array();
 	$contact_id = 0;
 
+	if ($url == '') {
+		return 0;
+	}
+
 	// We first try the nurl (http://server.tld/nick), most common case
 	$contacts = q("SELECT `id`, `avatar-date` FROM `contact`
 					WHERE `nurl` = '%s'