From 85fbc4318e99cb6a6ef09005f35247f44b0237a0 Mon Sep 17 00:00:00 2001
From: Prateek Rungta <prateekrungta@gmail.com>
Date: Fri, 26 Oct 2018 19:42:57 +0530
Subject: [PATCH 1/4] Fix multibye unicode support

Use escape() to percentage encode the final reconstructed string to percentage encode the string's bytes, and then decodeURIComponent() to properly handle unicode characters (as explained in https://blog.jse.li/posts/cloudflare-scrape-shield/).
---
 StandalonePHPEnkoder.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/StandalonePHPEnkoder.php b/StandalonePHPEnkoder.php
index f4646cb..53f23d3 100644
--- a/StandalonePHPEnkoder.php
+++ b/StandalonePHPEnkoder.php
@@ -201,9 +201,10 @@ public function enkode($content, $text = NULL) {
     // Our base case -- we'll eventually evaluate this code.
     // Note that we're using innerHTML() since document.write() fails on
     // pages loaded using AJAX.
-    $kode = "document.getElementById('ENKODER_ID').outerHTML=\"" . 
+    // Use escape() + decodeURIComponent() to preserve multibyte unicode
+    $kode = "document.getElementById('ENKODER_ID').outerHTML=decodeURIComponent(escape(\"" . 
       addcslashes($content,"\\\'\"&\n\r<>") . 
-      "\";";
+      "\"));";
 
     $max_length = max($max_length, strlen($kode) + $this->min_length + 1);
     

From ebc3365df9a4576f015a891e86a82205d7479650 Mon Sep 17 00:00:00 2001
From: Prateek Rungta <prateekrungta@gmail.com>
Date: Tue, 20 Nov 2018 17:18:37 +0530
Subject: [PATCH 2/4] Add script not null check

Fix `TypeError: Cannot read property 'parentNode' of null` bug
---
 StandalonePHPEnkoder.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/StandalonePHPEnkoder.php b/StandalonePHPEnkoder.php
index 53f23d3..454b21c 100644
--- a/StandalonePHPEnkoder.php
+++ b/StandalonePHPEnkoder.php
@@ -266,7 +266,7 @@ private function enkBuildJS($kode, $text = NULL) {
 <span id="$name">$msg</span><script id="script_{$name}" type="text/javascript">
 /* <!-- */
 function hivelogic_$name() {
-var kode="$clean",i,c,x,script=document.getElementById("script_{$name}");while(kode.indexOf("getElementById('ENKODER_ID')")===-1){eval(kode)};kode=kode.replace('ENKODER_ID','$name');eval(kode);script.parentNode.removeChild(script);
+var kode="$clean",i,c,x,script=document.getElementById("script_{$name}");while(kode.indexOf("getElementById('ENKODER_ID')")===-1){eval(kode)};kode=kode.replace('ENKODER_ID','$name');eval(kode);script&&script.parentNode.removeChild(script);
 }
 hivelogic_$name();
 /* --> */

From b59c000d797c3bbc87cb86e3137394f80a03c85f Mon Sep 17 00:00:00 2001
From: Prateek Rungta <prateekrungta@gmail.com>
Date: Tue, 20 Nov 2018 17:21:15 +0530
Subject: [PATCH 3/4] Improve resolution of reference to script DOM node

---
 StandalonePHPEnkoder.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/StandalonePHPEnkoder.php b/StandalonePHPEnkoder.php
index 454b21c..e6d838a 100644
--- a/StandalonePHPEnkoder.php
+++ b/StandalonePHPEnkoder.php
@@ -266,7 +266,7 @@ private function enkBuildJS($kode, $text = NULL) {
 <span id="$name">$msg</span><script id="script_{$name}" type="text/javascript">
 /* <!-- */
 function hivelogic_$name() {
-var kode="$clean",i,c,x,script=document.getElementById("script_{$name}");while(kode.indexOf("getElementById('ENKODER_ID')")===-1){eval(kode)};kode=kode.replace('ENKODER_ID','$name');eval(kode);script&&script.parentNode.removeChild(script);
+var kode="$clean",i,c,x,script=document.currentScript||document.getElementById("script_{$name}");while(kode.indexOf("getElementById('ENKODER_ID')")===-1){eval(kode)};kode=kode.replace('ENKODER_ID','$name');eval(kode);script&&script.parentNode.removeChild(script);
 }
 hivelogic_$name();
 /* --> */

From c5375677597c19c16e1b5ab371119cd69b0b91aa Mon Sep 17 00:00:00 2001
From: jools-r <julian@txpbuilders.com>
Date: Mon, 8 Mar 2021 22:26:15 +0100
Subject: [PATCH 4/4] Remove comments before and after inserted JS

- No longer necessary in modern browsers
- Ensures the enkoder still works when used with scripts that compact source code and strip out comments
---
 StandalonePHPEnkoder.php | 2 --
 1 file changed, 2 deletions(-)

diff --git a/StandalonePHPEnkoder.php b/StandalonePHPEnkoder.php
index e6d838a..7535581 100644
--- a/StandalonePHPEnkoder.php
+++ b/StandalonePHPEnkoder.php
@@ -264,12 +264,10 @@ private function enkBuildJS($kode, $text = NULL) {
     // perform the final eval().
     $js = <<<EOT
 <span id="$name">$msg</span><script id="script_{$name}" type="text/javascript">
-/* <!-- */
 function hivelogic_$name() {
 var kode="$clean",i,c,x,script=document.currentScript||document.getElementById("script_{$name}");while(kode.indexOf("getElementById('ENKODER_ID')")===-1){eval(kode)};kode=kode.replace('ENKODER_ID','$name');eval(kode);script&&script.parentNode.removeChild(script);
 }
 hivelogic_$name();
-/* --> */
 </script>
 EOT;