pkp#7916 revert back symfony html sanitizer and bring back html purifier

Author: touhidurabir

classes/core/PKPHtmlSanitizer.php

@@ -17,6 +17,8 @@
 
 namespace PKP\core;
 
+use HTMLPurifier;
+use HTMLPurifier_Config;
 use PKP\config\Config;
 
 class PKPString
@@ -161,15 +163,16 @@ public static function stripUnsafeHtml(?string $input, string $configKey = 'allo
             return '';
         }
 
-        static $caches;
-
-        if (!isset($caches[$configKey])) {
-            $caches[$configKey] = new \PKP\core\PKPHtmlSanitizer(
-                Config::getVar('security', $configKey)
-            );
+        static $purifier;
+        if (!isset($purifier)) {
+            $config = HTMLPurifier_Config::createDefault();
+            $config->set('Core.Encoding', 'utf-8');
+            $config->set('HTML.Doctype', 'HTML 4.01 Transitional');
+            $config->set('HTML.Allowed', Config::getVar('security', $configKey));
+            $config->set('Cache.SerializerPath', 'cache');
+            $purifier = new HTMLPurifier($config);
         }
-
-        return $caches[$configKey]->sanitize($input);
+        return $purifier->purify((string) $input);
     }
 
     /**

classes/core/PKPString.php

@@ -7,6 +7,7 @@
 		"dflydev/base32-crockford": "^1.0",
 		"doctrine/dbal": "^3.5",
 		"elcobvg/laravel-opcache": "^0.5.0",
+		"ezyang/htmlpurifier": "^4.17",
 		"firebase/php-jwt": "6.*",
 		"geoip2/geoip2": "~2.0",
 		"gettext/gettext": "5.*",
@@ -25,7 +26,6 @@
 		"smarty/smarty": "4.*",
 		"sokil/php-isocodes": "^4.1",
 		"sokil/php-isocodes-db-i18n": "^4.0",
-		"symfony/html-sanitizer": "^6.2",
 		"symfony/mailer": "^6.0",
 		"tinymce/tinymce": "^5.7",
 		"wikimedia/less.php": "3.*"