From 7955ba30eb66d724c3de04faf15dfc343de4d4e3 Mon Sep 17 00:00:00 2001
From: David E Vasquez <38011560+DavidEVasquez@users.noreply.github.com>
Date: Tue, 21 Jun 2022 10:15:24 -0600
Subject: [PATCH 1/2] Adjusted doStrikethrough preg_split

In PHP 8.1, preg_split handling null was deprecated. Changed null to 0
---
 system/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/system/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php b/system/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php
index 5292cc3..293cb20 100644
--- a/system/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php
+++ b/system/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php
@@ -1898,7 +1898,7 @@ class MarkdownExtra extends \Michelf\Markdown {
 		#    in:  text ~~deleted~~ from doc
 		#    out: text <del>deleted</del> from doc
 		#
-			$parts = preg_split('/(?<![~])(~~)(?![~])/', $text, null, PREG_SPLIT_DELIM_CAPTURE);
+			$parts = preg_split('/(?<![~])(~~)(?![~])/', $text, 0, PREG_SPLIT_DELIM_CAPTURE);
 			
 			//don't bother if nothing to do...
 			if(count($parts) <= 1)

From d5db937c92566ff0100bb6284ffa49d037cb88e8 Mon Sep 17 00:00:00 2001
From: David E Vasquez <github@pug.technology>
Date: Mon, 27 Jun 2022 10:28:50 -0600
Subject: [PATCH 2/2] Update MarkdownExtra.php

Changed the value from 0 to -1
---
 system/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/system/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php b/system/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php
index 293cb20..c11a233 100644
--- a/system/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php
+++ b/system/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php
@@ -1898,7 +1898,7 @@ class MarkdownExtra extends \Michelf\Markdown {
 		#    in:  text ~~deleted~~ from doc
 		#    out: text <del>deleted</del> from doc
 		#
-			$parts = preg_split('/(?<![~])(~~)(?![~])/', $text, 0, PREG_SPLIT_DELIM_CAPTURE);
+			$parts = preg_split('/(?<![~])(~~)(?![~])/', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
 			
 			//don't bother if nothing to do...
 			if(count($parts) <= 1)