From 1ece7f36bb3c635fb06fb0fc7a02ed0cbbb956aa Mon Sep 17 00:00:00 2001
From: Oscar <oscar.holt99@gmail.com>
Date: Wed, 5 Oct 2022 09:17:23 +1300
Subject: [PATCH] fixing php 8.1 errors

---
 src/filters/MisDirectionRequestProcessor.php | 2 +-
 src/objects/LinkMapping.php                  | 6 +++---
 src/services/MisdirectionService.php         | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/filters/MisDirectionRequestProcessor.php b/src/filters/MisDirectionRequestProcessor.php
index c21e2eb..524916c 100644
--- a/src/filters/MisDirectionRequestProcessor.php
+++ b/src/filters/MisDirectionRequestProcessor.php
@@ -66,7 +66,7 @@ public function process(HTTPRequest $request, callable $delegate)
 			// Retrieve the specific director rules.
 
 			if(($position = strpos($segment, '$')) !== false) {
-				$segment = rtrim(substr($segment, 0, $position), '/');
+				$segment = rtrim(substr($segment ?? '', 0, $position), '/');
 			}
 
 			// Determine if the current request matches a specific director rule.
diff --git a/src/objects/LinkMapping.php b/src/objects/LinkMapping.php
index 629aed3..b4ef2ec 100644
--- a/src/objects/LinkMapping.php
+++ b/src/objects/LinkMapping.php
@@ -302,7 +302,7 @@ public function onBeforeWrite() {
 		parent::onBeforeWrite();
 
 		$this->MappedLink = MisdirectionService::unify_URL($this->MappedLink);
-		$this->RedirectLink = trim($this->RedirectLink, ' ?/');
+		$this->RedirectLink = trim($this->RedirectLink ?? '', ' ?/');
 		$this->HostnameRestriction = MisdirectionService::unify_URL($this->HostnameRestriction);
 	}
 
@@ -333,7 +333,7 @@ public function getLink() {
 
 				// This is to support multiple sites, where the absolute page URLs are treated as relative.
 
-				return MisdirectionService::is_external_URL($link) ? ltrim($link, '/') : $link;
+				return MisdirectionService::is_external_URL($link) ? ltrim($link ?? '', '/') : $link;
 			}
 		}
 		else {
@@ -409,7 +409,7 @@ public function getLinkHost() {
 
 	public function getLinkSummary() {
 
-		return ($link = $this->getLink()) ? trim($link, ' ?/') : '-';
+		return ($link = $this->getLink()) ? trim($link ?? '', ' ?/') : '-';
 	}
 
 	/**
diff --git a/src/services/MisdirectionService.php b/src/services/MisdirectionService.php
index 19dd015..4e9d85b 100644
--- a/src/services/MisdirectionService.php
+++ b/src/services/MisdirectionService.php
@@ -29,7 +29,7 @@ class MisdirectionService {
 
 	public static function unify_URL($URL) {
 
-		return strtolower(trim($URL, ' ?/'));
+		return strtolower(trim($URL ?? '', ' ?/'));
 	}
 
 	/**
@@ -41,7 +41,7 @@ public static function unify_URL($URL) {
 
 	public static function is_external_URL($URL) {
 
-		$URL = trim($URL, '/?!"#$%&\'()*+,-.@:;<=>[\\]^_`{|}~');
+		$URL = trim($URL ?? '', '/?!"#$%&\'()*+,-.@:;<=>[\\]^_`{|}~');
 		return preg_match('%^(?:(?:https?|ftp)://)(?:\S+(?::\S*)?@|\d{1,3}(?:\.\d{1,3}){3}|(?:(?:[a-z\d\x{00a1}-\x{ffff}]+-?)*[a-z\d\x{00a1}-\x{ffff}]+)(?:\.(?:[a-z\d\x{00a1}-\x{ffff}]+-?)*[a-z\d\x{00a1}-\x{ffff}]+)*(?:\.[a-z\x{00a1}-\x{ffff}]{2,6}))(?::\d+)?(?:[^\s]*)?$%iu', $URL);
 	}